diff --git a/__tests__/datePicker.localization.test.js b/__tests__/datePicker.localization.test.js
index 86ffa8b..43e1ce6 100644
--- a/__tests__/datePicker.localization.test.js
+++ b/__tests__/datePicker.localization.test.js
@@ -2,9 +2,10 @@ import DatePicker from "../src/datePicker";
 
 jest.useFakeTimers();
 
+const containerId = 'test-container';
+let datePicker;
+
 describe('Localization', () => {
-  let datePicker;
-  const containerId = 'test-container';
 
   beforeEach(() => {
     document.body.innerHTML = `<div id="${containerId}"></div>`;
@@ -184,50 +185,756 @@ describe('Localization', () => {
   });
 });
 
-describe('Localization with Page Language', () => {
+
+describe('Localization for Bulgarian (bg-BG)', () => {
   let datePicker;
-  const containerId = 'test-container';
 
   beforeEach(() => {
     document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
   });
 
-  const setHtmlLangAttribute = (lang) => {
-    document.documentElement.lang = lang;
-  };
+  test('displays day names correctly in Bulgarian', () => {
+    datePicker.options.language = 'bg-BG';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Нд'); // Sunday in Bulgarian
+    expect(dayNames).toContain('Пн'); // Monday in Bulgarian
+  });
 
-  const testPageLanguageSetting = (lang, expectedDayName, expectedMonthName) => {
-    test(`adapts to page language ${lang}`, () => {
-      setHtmlLangAttribute(lang);
-      datePicker = new DatePicker(containerId, {
-        mode: 'single',
-        onSelect: jest.fn(),
-        usePageLanguage: true
-      });
-      datePicker.init();
-      datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
-      datePicker.render();
+  test('displays month names correctly in Bulgarian', () => {
+    datePicker.options.language = 'bg-BG';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Януари 2023');
+  });
+});
 
-      const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
-      const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+describe('Localization for Czech (cs)', () => {
+  let datePicker;
 
-      expect(dayNames).toContain(expectedDayName);
-      expect(monthDisplay).toContain(expectedMonthName);
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
     });
-  };
+    datePicker.init();
+  });
 
+  test('displays day names correctly in Czech', () => {
+    datePicker.options.language = 'cs';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Ne'); // Sunday in Czech
+    expect(dayNames).toContain('Po'); // Monday in Czech
+  });
+
+  test('displays month names correctly in Czech', () => {
+    datePicker.options.language = 'cs';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Leden 2023');
+  });
+});
+
+describe('Localization for Danish (da)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Danish', () => {
+    datePicker.options.language = 'da';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Søn'); // Sunday in Danish
+    expect(dayNames).toContain('Man'); // Monday in Danish
+  });
+
+  test('displays month names correctly in Danish', () => {
+    datePicker.options.language = 'da';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Januar 2023');
+  });
+});
+
+describe('Localization for Greek (el)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Greek', () => {
+    datePicker.options.language = 'el';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Κυρ'); // Sunday in Greek
+    expect(dayNames).toContain('Δευ'); // Monday in Greek
+  });
+
+  test('displays month names correctly in Greek', () => {
+    datePicker.options.language = 'el';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Ιανουάριος 2023');
+  });
+});
+
+
+describe('Localization for Finnish (fi)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Finnish', () => {
+    datePicker.options.language = 'fi';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Su'); // Sunday in Finnish
+    expect(dayNames).toContain('Ma'); // Monday in Finnish
+  });
+
+  test('displays month names correctly in Finnish', () => {
+    datePicker.options.language = 'fi';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Tammikuu 2023');
+  });
+});
+
+
+describe('Localization for Croatian (hr-HR)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Croatian', () => {
+    datePicker.options.language = 'hr-HR';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Ned'); // Sunday in Croatian
+    expect(dayNames).toContain('Pon'); // Monday in Croatian
+  });
+
+  test('displays month names correctly in Croatian', () => {
+    datePicker.options.language = 'hr-HR';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Siječanj 2023');
+  });
+});
+
+
+describe('Localization for Hungarian (hu)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Hungarian', () => {
+    datePicker.options.language = 'hu';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('V'); // Sunday in Hungarian
+    expect(dayNames).toContain('H'); // Monday in Hungarian
+  });
+
+  test('displays month names correctly in Hungarian', () => {
+    datePicker.options.language = 'hu';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Január 2023');
+  });
+});
+
+
+describe('Localization for Indonesian (id)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Indonesian', () => {
+    datePicker.options.language = 'id';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Min'); // Sunday in Indonesian
+    expect(dayNames).toContain('Sen'); // Monday in Indonesian
+  });
+
+  test('displays month names correctly in Indonesian', () => {
+    datePicker.options.language = 'id';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Januari 2023');
+  });
+});
+
+
+describe('Localization for Korean (ko)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Korean', () => {
+    datePicker.options.language = 'ko';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('일'); // Sunday in Korean
+    expect(dayNames).toContain('월'); // Monday in Korean
+  });
+
+  test('displays month names correctly in Korean', () => {
+    datePicker.options.language = 'ko';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('1월 2023');
+  });
+});
+
+
+describe('Localization for Lithuanian (lt-LT)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Lithuanian', () => {
+    datePicker.options.language = 'lt-LT';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Sek'); // Sunday in Lithuanian
+    expect(dayNames).toContain('Pir'); // Monday in Lithuanian
+  });
+
+  test('displays month names correctly in Lithuanian', () => {
+    datePicker.options.language = 'lt-LT';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Sausis 2023');
+  });
+});
+
+
+describe('Localization for Norwegian Bokmål (nb)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Norwegian Bokmål', () => {
+    datePicker.options.language = 'nb';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Søn'); // Sunday in Norwegian Bokmål
+    expect(dayNames).toContain('Man'); // Monday in Norwegian Bokmål
+  });
+
+  test('displays month names correctly in Norwegian Bokmål', () => {
+    datePicker.options.language = 'nb';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Januar 2023');
+  });
+});
+
+
+describe('Localization for Polish (pl)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Polish', () => {
+    datePicker.options.language = 'pl';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('N'); // Sunday in Polish
+    expect(dayNames).toContain('Pn'); // Monday in Polish
+  });
+
+  test('displays month names correctly in Polish', () => {
+    datePicker.options.language = 'pl';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Styczeń 2023');
+  });
+});
+
+describe('Localization for Brazilian Portuguese (pt-BR)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Brazilian Portuguese', () => {
+    datePicker.options.language = 'pt-BR';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Dom'); // Sunday in Brazilian Portuguese
+    expect(dayNames).toContain('Seg'); // Monday in Brazilian Portuguese
+  });
+
+  test('displays month names correctly in Brazilian Portuguese', () => {
+    datePicker.options.language = 'pt-BR';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Janeiro 2023');
+  });
+});
+
+describe('Localization for European Portuguese (pt-PT)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in European Portuguese', () => {
+    datePicker.options.language = 'pt-PT';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Dom'); // Sunday in European Portuguese
+    expect(dayNames).toContain('Seg'); // Monday in European Portuguese
+  });
+
+  test('displays month names correctly in European Portuguese', () => {
+    datePicker.options.language = 'pt-PT';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Janeiro 2023');
+  });
+});
+
+describe('Localization for Romanian (ro-RO)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Romanian', () => {
+    datePicker.options.language = 'ro-RO';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Dum'); // Sunday in Romanian
+    expect(dayNames).toContain('Lun'); // Monday in Romanian
+  });
+
+  test('displays month names correctly in Romanian', () => {
+    datePicker.options.language = 'ro-RO';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Ianuarie 2023');
+  });
+});
+
+describe('Localization for Slovak (sk-SK)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6],
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Slovak', () => {
+    datePicker.options.language = 'sk-SK';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Ne'); // Sunday in Slovak
+    expect(dayNames).toContain('Po'); // Monday in Slovak
+  });
+
+  test('displays month names correctly in Slovak', () => {
+    datePicker.options.language = 'sk-SK';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Január 2023');
+  });
+});
+
+describe('Localization for Slovenian (sl-SL)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Slovenian', () => {
+    datePicker.options.language = 'sl-SL';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Ned'); // Sunday in Slovenian
+    expect(dayNames).toContain('Pon'); // Monday in Slovenian
+  });
+
+  test('displays month names correctly in Slovenian', () => {
+    datePicker.options.language = 'sl-SL';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Januar 2023');
+  });
+});
+
+describe('Localization for Swedish (sv)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Swedish', () => {
+    datePicker.options.language = 'sv';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Sön'); // Sunday in Swedish
+    expect(dayNames).toContain('Mån'); // Monday in Swedish
+  });
+
+  test('displays month names correctly in Swedish', () => {
+    datePicker.options.language = 'sv';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Januari 2023');
+  });
+});
+
+describe('Localization for Thai (th)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Thai', () => {
+    datePicker.options.language = 'th';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('อา.'); // Sunday in Thai
+    expect(dayNames).toContain('จ.'); // Monday in Thai
+  });
+
+  test('displays month names correctly in Thai', () => {
+    datePicker.options.language = 'th';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('มกราคม 2023');
+  });
+});
+
+describe('Localization for Turkish (tr)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Turkish', () => {
+    datePicker.options.language = 'tr';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('Paz'); // Sunday in Turkish
+    expect(dayNames).toContain('Pzt'); // Monday in Turkish
+  });
+
+  test('displays month names correctly in Turkish', () => {
+    datePicker.options.language = 'tr';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Ocak 2023');
+  });
+});
+
+
+describe('Localization for Vietnamese (vi)', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+    datePicker = new DatePicker(containerId, {
+      mode: 'single',
+      onSelect: jest.fn(),
+      blockedDays: [0, 6], // Sundays and Saturdays
+      showDayNames: true
+    });
+    datePicker.init();
+  });
+
+  test('displays day names correctly in Vietnamese', () => {
+    datePicker.options.language = 'vi';
+    datePicker.init();
+    const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+    expect(dayNames).toContain('CN'); // Sunday in Vietnamese
+    expect(dayNames).toContain('T2'); // Monday in Vietnamese
+  });
+
+  test('displays month names correctly in Vietnamese', () => {
+    datePicker.options.language = 'vi';
+    datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+    datePicker.init();
+    const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+    expect(monthDisplay).toContain('Tháng Một 2023');
+  });
+});
+
+
+describe('Localization with Page Language', () => {
+  let datePicker;
+
+
+  beforeEach(() => {
+    document.body.innerHTML = `<div id="${containerId}"></div>`;
+  });
+
+  const setHtmlLangAttribute = (lang) => {
+    document.documentElement.lang = lang;
+  };
+
+  const testPageLanguageSetting = (lang, expectedDayName, expectedMonthName) => {
+    test(`adapts to page language ${lang}`, () => {
+      setHtmlLangAttribute(lang);
+      datePicker = new DatePicker(containerId, {
+        mode: 'single',
+        onSelect: jest.fn(),
+        usePageLanguage: true
+      });
+      datePicker.init();
+      datePicker.currentDate = new Date(2023, 0, 1); // January 1, 2023
+      datePicker.render();
+
+      const dayNames = datePicker.element.querySelector('.datepicker-day-names').textContent;
+      const monthDisplay = datePicker.element.querySelector('.month-display').textContent;
+
+      expect(dayNames).toContain(expectedDayName);
+      expect(monthDisplay).toContain(expectedMonthName);
+    });
+  };
+
+
+  testPageLanguageSetting('en', 'Sun', 'January 2023');
+  testPageLanguageSetting('fr', 'Dim', 'Janvier 2023');
+  testPageLanguageSetting('es', 'Dom', 'Enero 2023');
+  testPageLanguageSetting('de', 'So', 'Januar 2023');
+  testPageLanguageSetting('it', 'Dom', 'Gennaio 2023');
+  testPageLanguageSetting('nl', 'Zo', 'Januari 2023');
+  testPageLanguageSetting('pt', 'Dom', 'Janeiro 2023');
+  testPageLanguageSetting('ja', '日', '一月 2023');
+  testPageLanguageSetting('zh-CN', '日', '一月 2023');
+  testPageLanguageSetting('zh-TW', '日', '一月 2023');
+  testPageLanguageSetting('ru', 'Вс', 'Январь 2023');
+  testPageLanguageSetting('bg-BG', 'Нд', 'Януари 2023');
+  testPageLanguageSetting('cs', 'Ne', 'Leden 2023');
+  testPageLanguageSetting('da', 'Søn', 'Januar 2023');
+  testPageLanguageSetting('el', 'Κυρ', 'Ιανουάριος 2023');
+  testPageLanguageSetting('fi', 'Su', 'Tammikuu 2023');
+  testPageLanguageSetting('hr-HR', 'Ned', 'Siječanj 2023');
+  testPageLanguageSetting('hu', 'V', 'Január 2023');
+  testPageLanguageSetting('id', 'Min', 'Januari 2023');
+  testPageLanguageSetting('ko', '일', '1월 2023');
+  testPageLanguageSetting('lt-LT', 'Sek', 'Sausis 2023');
+  testPageLanguageSetting('nb', 'Søn', 'Januar 2023');
+  testPageLanguageSetting('pl', 'N', 'Styczeń 2023');
+  testPageLanguageSetting('pt-BR', 'Dom', 'Janeiro 2023');
+  testPageLanguageSetting('pt-PT', 'Dom', 'Janeiro 2023');
+  testPageLanguageSetting('ro-RO', 'Dum', 'Ianuarie 2023');
+  testPageLanguageSetting('sk-SK', 'Ne', 'Január 2023');
+  testPageLanguageSetting('sl-SL', 'Ned', 'Januar 2023');
+  testPageLanguageSetting('sv', 'Sön', 'Januari 2023');
+  testPageLanguageSetting('th', 'อา.', 'มกราคม 2023');
+  testPageLanguageSetting('tr', 'Paz', 'Ocak 2023');
+  testPageLanguageSetting('vi', 'CN', 'Tháng Một 2023');
 
-  testPageLanguageSetting('en', 'Sun', 'January 2023');
-  testPageLanguageSetting('fr', 'Dim', 'Janvier 2023');
-  testPageLanguageSetting('es', 'Dom', 'Enero 2023');
-  testPageLanguageSetting('de', 'So', 'Januar 2023');
-  testPageLanguageSetting('it', 'Dom', 'Gennaio 2023');
-  testPageLanguageSetting('nl', 'Zo', 'Januari 2023');
-  testPageLanguageSetting('pt', 'Dom', 'Janeiro 2023');
-  testPageLanguageSetting('ja', '日', '一月 2023');
-  testPageLanguageSetting('zh-CN', '日', '一月 2023');
-  testPageLanguageSetting('zh-TW', '日', '一月 2023');
-  testPageLanguageSetting('ru', 'Вс', 'Январь 2023');
 
   afterEach(() => {
     setHtmlLangAttribute('en');
diff --git a/dist/datepicker.bundle.js b/dist/datepicker.bundle.js
index 8d1a2fe..768c6c5 100644
--- a/dist/datepicker.bundle.js
+++ b/dist/datepicker.bundle.js
@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.DatePicker=t():e.DatePicker=t()}(this,(()=>(()=>{"use strict";var e={d:(t,n)=>{for(var a in n)e.o(n,a)&&!e.o(t,a)&&Object.defineProperty(t,a,{enumerable:!0,get:n[a]})},o:(e,t)=>Object.prototype.hasOwnProperty.call(e,t)},t={};function n(e,t,n){var a=e.querySelector(".prev-month"),i=e.querySelector(".next-month"),r=e.querySelector(".datepicker-calendar-container"),l=e.querySelector(".datepicker-days");function o(n,a){return function(i){i.stopPropagation();var r=document.activeElement;t(n),requestAnimationFrame((function(){r&&r.className.includes(a)&&e.querySelector(".".concat(a)).focus()}))}}a.removeEventListener("click",a.listener),i.removeEventListener("click",i.listener),l.removeEventListener("click",l.listener),l.removeEventListener("keydown",l.listener),document.removeEventListener("click",document.listener),a.listener=o(-1,"prev-month"),i.listener=o(1,"next-month"),a.addEventListener("click",a.listener),i.addEventListener("click",i.listener),l.listener=function(e){if("click"===e.type||"keydown"===e.type&&"Enter"===e.key){var t=e.target.closest(".datepicker-day");if(t&&!t.classList.contains("blocked")){var a=parseInt(t.getAttribute("data-day"),10),i=parseInt(t.getAttribute("data-month"),10);n(a,i)}}},document.listener=function(t){r.contains(t.target)||e.querySelector(".datepicker-input").contains(t.target)||(r.style.display="none")},a.addEventListener("click",a.listener),i.addEventListener("click",i.listener),l.addEventListener("click",l.listener),l.addEventListener("keydown",l.listener),document.addEventListener("click",document.listener)}e.d(t,{default:()=>h});var a={en:"Choose a date",fr:"Choisissez une date",es:"Elige una fecha",de:"Wählen Sie ein Datum",it:"Scegli una data",nl:"Kies een datum",pt:"Escolha uma data",ja:"日付を選択","zh-CN":"选择日期","zh-TW":"選擇日期",ru:"Выберите дату"},i={en:{prevMonth:"Go to previous month",nextMonth:"Go to next month"},fr:{prevMonth:"Aller au mois précédent",nextMonth:"Aller au mois suivant"},es:{prevMonth:"Ir al mes anterior",nextMonth:"Ir al siguiente mes"},de:{prevMonth:"Gehe zum vorherigen Monat",nextMonth:"Gehe zum nächsten Monat"},it:{prevMonth:"Vai al mese precedente",nextMonth:"Vai al mese successivo"},nl:{prevMonth:"Ga naar de vorige maand",nextMonth:"Ga naar de volgende maand"},pt:{prevMonth:"Ir para o mês anterior",nextMonth:"Ir para o próximo mês"},ja:{prevMonth:"前の月へ",nextMonth:"次の月へ"},"zh-CN":{prevMonth:"转到上一个月",nextMonth:"转到下一个月"},"zh-TW":{prevMonth:"轉到上一個月",nextMonth:"轉到下一個月"},ru:{prevMonth:"Перейти к предыдущему месяцу",nextMonth:"Перейти к следующему месяцу"}},r={en:["January","February","March","April","May","June","July","August","September","October","November","December"],fr:["Janvier","Février","Mars","Avril","Mai","Juin","Juillet","Août","Septembre","Octobre","Novembre","Décembre"],es:["Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre"],de:["Januar","Februar","März","April","Mai","Juni","Juli","August","September","Oktober","November","Dezember"],it:["Gennaio","Febbraio","Marzo","Aprile","Maggio","Giugno","Luglio","Agosto","Settembre","Ottobre","Novembre","Dicembre"],nl:["Januari","Februari","Maart","April","Mei","Juni","Juli","Augustus","September","Oktober","November","December"],pt:["Janeiro","Fevereiro","Março","Abril","Maio","Junho","Julho","Agosto","Setembro","Outubro","Novembro","Dezembro"],ja:["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"],"zh-CN":["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"],"zh-TW":["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"],ru:["Январь","Февраль","Март","Апрель","Май","Июнь","Июль","Август","Сентяюрь","Октябрь","Ноябрь","Декабрь"]},l={en:["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],fr:["Dim","Lun","Mar","Mer","Jeu","Ven","Sam"],es:["Dom","Lun","Mar","Mié","Jue","Vie","Sáb"],de:["So","Mo","Di","Mi","Do","Fr","Sa"],it:["Dom","Lun","Mar","Mer","Gio","Ven","Sab"],nl:["Zo","Ma","Di","Wo","Do","Vr","Za"],pt:["Dom","Seg","Ter","Qua","Qui","Sex","Sáb"],ja:["日","月","火","水","木","金","土"],"zh-CN":["日","一","二","三","四","五","六"],"zh-TW":["日","一","二","三","四","五","六"],ru:["Вс","Пн","Вт","Ср","Чт","Пт","Сб"]},o={1:"一",2:"二",3:"三",4:"四",5:"五",6:"六",7:"七",8:"八",9:"九",10:"十",11:"十一",12:"十二",13:"十三",14:"十四",15:"十五",16:"十六",17:"十七",18:"十八",19:"十九",20:"二十",21:"二十一",22:"二十二",23:"二十三",24:"二十四",25:"二十五",26:"二十六",27:"二十七",28:"二十八",29:"二十九",30:"三十",31:"三十一"},s={"zh-CN":{1:"一",2:"二",3:"三",4:"四",5:"五",6:"六",7:"七",8:"八",9:"九",10:"十",11:"十一",12:"十二",13:"十三",14:"十四",15:"十五",16:"十六",17:"十七",18:"十八",19:"十九",20:"二十",21:"廿一",22:"廿二",23:"廿三",24:"廿四",25:"廿五",26:"廿六",27:"廿七",28:"廿八",29:"廿九",30:"三十",31:"三十一"},"zh-TW":{1:"一",2:"二",3:"三",4:"四",5:"五",6:"六",7:"七",8:"八",9:"九",10:"十",11:"十一",12:"十二",13:"十三",14:"十四",15:"十五",16:"十六",17:"十七",18:"十八",19:"十九",20:"二十",21:"廿一",22:"廿二",23:"廿三",24:"廿四",25:"廿五",26:"廿六",27:"廿七",28:"廿八",29:"廿九",30:"三十",31:"三十一"}};function c(e){var t=document.documentElement.lang;return["en","fr","es","de","it","nl","pt","ja","zh-CN","zh-TW","ru"].includes(t)?t:e}function d(e,t,n,a,i,r,l){var c=new Date(e,t,n),d=n;"ja"===l.language?d=o[n]:"zh-CN"!==l.language&&"zh-TW"!==l.language||(d=s[l.language][n]);var u=a?"datepicker-day current-month":"datepicker-day";return l.blockedDays.includes(c.getDay())?u+=" blocked":a&&i(c)?u+=" selected":a&&r(c)&&(u+=" in-range"),'<div tabindex="0" class="'.concat(u,'" data-day="').concat(n,'" data-month="').concat(t,'"><span>').concat(d,"</span></div>")}function u(e,t,n,a){var o,s,c=document.createElement("div");return c.className="datepicker-calendar-container ".concat(null==a?void 0:a.language),c.style.display=a.textInputEnabled?"none":"block",c.innerHTML='\n    <div class="datepicker-header">\n      <button aria-label="'.concat(i[a.language].prevMonth,'" class="prev-month">&lt;</button>\n      <span class="month-display">').concat((o=e.getMonth(),s=a.language,r[s][o])," ").concat(e.getFullYear(),'</span>\n      <button aria-label="').concat(i[a.language].nextMonth,'" class="next-month">&gt;</button>\n    </div>\n    ').concat(a.showDayNames?function(e){var t=l[e];return'<div class="datepicker-day-names">'.concat(t.map((function(e){return"<div>".concat(e,"</div>")})).join(""),"</div>")}(a.language):"",'\n    <div class="datepicker-days">\n      ').concat(function(e,t,n,a){var i=e.getFullYear(),r=e.getMonth(),l=new Date(i,r,1),o=new Date(i,r,0).getDate(),s=new Date(i,r+1,0).getDate();1===r&&function(e){return e%4==0&&e%100!=0||e%400==0}(i)&&(s=29);for(var c='<div class="datepicker-week">',u=l.getDay();u>0;u--)c+=d(i,r-1,o-u+1,!1,t,n,a);for(var h=1;h<=s;h++)c+=d(i,r,h,!0,t,n,a);for(var p=new Date(i,r,s).getDay(),v=1;p<6;v++,p++)c+=d(i,r+1,v,!1,t,n,a);return c+"</div>"}(e,t,n,a),"\n    </div>\n  "),c}function h(e,t){var i,r,l,o,s,d,h,p,v,m,g;this.element=document.getElementById(e),this.currentDate=new Date,this.currentDate.setDate(1),this.selectedStartDate=null,this.selectedEndDate=null,this.options={mode:null!==(i=null==t?void 0:t.mode)&&void 0!==i?i:"single",onSelect:null!==(r=null==t?void 0:t.onSelect)&&void 0!==r?r:null,blockedDays:null!==(l=null==t?void 0:t.blockedDays)&&void 0!==l?l:[],showDayNames:null===(o=null==t?void 0:t.showDayNames)||void 0===o||o,textInputEnabled:null!==(s=null==t?void 0:t.textInputEnabled)&&void 0!==s&&s,darkMode:null!==(d=null==t?void 0:t.darkMode)&&void 0!==d&&d,usePageLanguage:null!==(h=null==t?void 0:t.usePageLanguage)&&void 0!==h&&h,usePageLanguageFallback:null!==(p=null==t?void 0:t.usePageLanguageFallback)&&void 0!==p?p:"en",language:null!=t&&t.usePageLanguage?c(null==t?void 0:t.usePageLanguageFallback):null!==(v=null==t?void 0:t.language)&&void 0!==v?v:"en",textInputPlaceholder:null!==(m=null==t?void 0:t.textInputPlaceholder)&&void 0!==m?m:a[null!=t&&t.usePageLanguage?c():null!==(g=null==t?void 0:t.language)&&void 0!==g?g:"en"]},this.init=function(){this.options.darkMode&&this.element.classList.add("dark"),this.calendarContainer=u(this.currentDate,this.isDateSelected.bind(this),this.isDateInRange.bind(this),this.options),this.options.textInputEnabled&&(this.input=document.createElement("input"),this.input.value=this.options.textInputPlaceholder,this.input.type="text",this.input.className="datepicker-input",this.input.readOnly=!0,this.element.appendChild(this.input)),this.element.appendChild(this.calendarContainer),this.render(),n(this.element,this.changeMonth.bind(this),this.handleDayClick.bind(this))},this.render=function(){this.element.innerHTML="";var e=u(this.currentDate,this.isDateSelected.bind(this),this.isDateInRange.bind(this),this.options);if(this.options.textInputEnabled&&!this.element.querySelector(".datepicker-input")){var t=document.createElement("input");if(t.value=this.options.textInputPlaceholder,t.type="text",t.id="datepicker-input",t.className="datepicker-input",t.readOnly=!0,this.selectedStartDate)if("single"===this.options.mode)t.value=this.localizedDate(this.selectedStartDate,this.options.language);else if("range"===this.options.mode){var a=this.localizedDate(this.selectedStartDate,this.options.language);this.selectedEndDate&&(a+=" - ".concat(this.localizedDate(this.selectedEndDate,this.options.language))),t.value=a}t.removeEventListener("click",t.listener),t.removeEventListener("keydown",t.listener),t.addEventListener("click",(function(){e.style.display="block"})),t.addEventListener("keydown",(function(t){"Enter"===t.key&&(e.style.display="block"===e.style.display?"none":"block")})),this.element.appendChild(t)}this.element.appendChild(e),n(this.element,this.changeMonth.bind(this),this.handleDayClick.bind(this))},this.localizedDate=function(e,t){return e.toLocaleDateString(t,{year:"numeric",month:"long",day:"numeric"})},this.isDateSelected=function(e){return this.selectedStartDate&&this.selectedStartDate.toDateString()===e.toDateString()||this.selectedEndDate&&this.selectedEndDate.toDateString()===e.toDateString()},this.isDateInRange=function(e){return this.selectedStartDate&&this.selectedEndDate&&e>this.selectedStartDate&&e<this.selectedEndDate},this.handleDayClick=function(e,n){var a=this.currentDate.getFullYear();-1===n?(n=11,a--):12===n&&(n=0,a++);var i=new Date(a,n,e);"single"===this.options.mode?(this.selectedStartDate=i,this.selectedEndDate=null,this.options.textInputEnabled&&(this.element.querySelector(".datepicker-input").value=i.toDateString()),this.triggerSelectCallback(),this.render(),t.textInputEnabled&&(this.element.querySelector(".datepicker-calendar-container").style.display="none")):"range"===this.options.mode&&(!this.selectedStartDate||this.selectedEndDate?(this.selectedStartDate=i,this.selectedEndDate=null,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block"):this.selectedStartDate&&!this.selectedEndDate&&(i>this.selectedStartDate?(this.selectedEndDate=i,this.element.querySelector(".datepicker-input")&&(this.element.querySelector(".datepicker-input").value="".concat(this.selectedStartDate.toDateString()," ").concat(void 0!==this.selectedEndDate.toDateString()?"- "+this.selectedEndDate.toDateString():"")),this.triggerSelectCallback(),this.render(),t.textInputEnabled&&(this.element.querySelector(".datepicker-calendar-container").style.display="none")):(this.selectedStartDate=i,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block")))},this.changeMonth=function(e){var t,n={currentYear:(t=this.currentDate).getFullYear(),currentMonth:t.getMonth(),currentDay:t.getDate()},a=n.currentYear,i=n.currentDay,r=new Date(a,n.currentMonth+e,1),l=new Date(a,r.getMonth()+1,0).getDate();r.setDate(Math.min(i,l)),this.currentDate=r,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block"},this.triggerSelectCallback=function(){this.options.onSelect&&this.options.onSelect(this.selectedStartDate,this.selectedEndDate)}}return t.default})()));
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.DatePicker=t():e.DatePicker=t()}(this,(()=>(()=>{"use strict";var e={d:(t,n)=>{for(var a in n)e.o(n,a)&&!e.o(t,a)&&Object.defineProperty(t,a,{enumerable:!0,get:n[a]})},o:(e,t)=>Object.prototype.hasOwnProperty.call(e,t)},t={};function n(e,t,n){var a=e.querySelector(".prev-month"),i=e.querySelector(".next-month"),r=e.querySelector(".datepicker-calendar-container"),o=e.querySelector(".datepicker-days");function s(n,a){return function(i){i.stopPropagation();var r=document.activeElement;t(n),requestAnimationFrame((function(){r&&r.className.includes(a)&&e.querySelector(".".concat(a)).focus()}))}}a.removeEventListener("click",a.listener),i.removeEventListener("click",i.listener),o.removeEventListener("click",o.listener),o.removeEventListener("keydown",o.listener),document.removeEventListener("click",document.listener),a.listener=s(-1,"prev-month"),i.listener=s(1,"next-month"),a.addEventListener("click",a.listener),i.addEventListener("click",i.listener),o.listener=function(e){if("click"===e.type||"keydown"===e.type&&"Enter"===e.key){var t=e.target.closest(".datepicker-day");if(t&&!t.classList.contains("blocked")){var a=parseInt(t.getAttribute("data-day"),10),i=parseInt(t.getAttribute("data-month"),10);n(a,i)}}},document.listener=function(t){r.contains(t.target)||e.querySelector(".datepicker-input").contains(t.target)||(r.style.display="none")},a.addEventListener("click",a.listener),i.addEventListener("click",i.listener),o.addEventListener("click",o.listener),o.addEventListener("keydown",o.listener),document.addEventListener("click",document.listener)}e.d(t,{default:()=>m});var a={en:"Choose a date",fr:"Choisissez une date",es:"Elige una fecha",de:"Wählen Sie ein Datum",it:"Scegli una data",nl:"Kies een datum",pt:"Escolha uma data",ja:"日付を選択","zh-CN":"选择日期","zh-TW":"選擇日期",ru:"Выберите дату","bg-BG":"Изберете дата",cs:"Vyberte datum",da:"Vælg en dato",el:"Επιλέξτε μια ημερομηνία",fi:"Valitse päivämäärä","hr-HR":"Odaberite datum",hu:"Válasszon egy dátumot",id:"Pilih tanggal",ko:"날짜를 선택하세요","lt-LT":"Pasirinkite datą",nb:"Velg en dato",pl:"Wybierz datę","pt-BR":"Escolha uma data","pt-PT":"Escolha uma data","ro-RO":"Alegeți o dată","sk-SK":"Vyberte dátum","sl-SL":"Izberite datum",sv:"Välj ett datum",th:"เลือกวันที่",tr:"Bir tarih seçin",vi:"Chọn ngày"},i={en:{prevMonth:"Go to previous month",nextMonth:"Go to next month"},fr:{prevMonth:"Aller au mois précédent",nextMonth:"Aller au mois suivant"},es:{prevMonth:"Ir al mes anterior",nextMonth:"Ir al siguiente mes"},de:{prevMonth:"Gehe zum vorherigen Monat",nextMonth:"Gehe zum nächsten Monat"},it:{prevMonth:"Vai al mese precedente",nextMonth:"Vai al mese successivo"},nl:{prevMonth:"Ga naar de vorige maand",nextMonth:"Ga naar de volgende maand"},pt:{prevMonth:"Ir para o mês anterior",nextMonth:"Ir para o próximo mês"},ja:{prevMonth:"前の月へ",nextMonth:"次の月へ"},"zh-CN":{prevMonth:"转到上一个月",nextMonth:"转到下一个月"},"zh-TW":{prevMonth:"轉到上一個月",nextMonth:"轉到下一個月"},ru:{prevMonth:"Перейти к предыдущему месяцу",nextMonth:"Перейти к следующему месяцу"},"bg-BG":{prevMonth:"Отиди на предишния месец",nextMonth:"Отиди на следващия месец"},cs:{prevMonth:"Přejít 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c(e){var t=document.documentElement.lang;return["en","fr","es","de","it","nl","pt","ja","zh-CN","zh-TW","ru","bg-BG","cs","da","el","fi","hr-HR","hu","id","ko","lt-LT","nb","pl","pt-BR","pt-PT","ro-RO","sk-SK","sl-SL","sv","th","tr","vi"].includes(t)?t:e}function h(e,t,n,a,i,r,o){var c=new Date(e,t,n),h=n;"ja"===o.language?h=s[n]:"zh-CN"===o.language||"zh-TW"===o.language?h=l[o.language][n]:"ko"===o.language?h=u[n]:"th"===o.language&&(h=d[n]);var p=a?"datepicker-day current-month":"datepicker-day";return o.blockedDays.includes(c.getDay())?p+=" blocked":a&&i(c)?p+=" selected":a&&r(c)&&(p+=" in-range"),'<div tabindex="0" class="'.concat(p,'" data-day="').concat(n,'" data-month="').concat(t,'"><span>').concat(h,"</span></div>")}function p(e,t,n,a){var s,l,u=document.createElement("div");return u.className="datepicker-calendar-container ".concat(null==a?void 0:a.language),u.style.display=a.textInputEnabled?"none":"block",u.innerHTML='\n    <div class="datepicker-header">\n      <button aria-label="'.concat(i[a.language].prevMonth,'" class="prev-month">&lt;</button>\n      <span class="month-display">').concat((s=e.getMonth(),l=a.language,r[l][s])," ").concat(e.getFullYear(),'</span>\n      <button aria-label="').concat(i[a.language].nextMonth,'" class="next-month">&gt;</button>\n    </div>\n    ').concat(a.showDayNames?function(e){var t=o[e];return'<div class="datepicker-day-names">'.concat(t.map((function(e){return"<div>".concat(e,"</div>")})).join(""),"</div>")}(a.language):"",'\n    <div class="datepicker-days">\n      ').concat(function(e,t,n,a){var i=e.getFullYear(),r=e.getMonth(),o=new Date(i,r,1),s=new Date(i,r,0).getDate(),l=new Date(i,r+1,0).getDate();1===r&&function(e){return e%4==0&&e%100!=0||e%400==0}(i)&&(l=29);for(var u='<div class="datepicker-week">',d=o.getDay();d>0;d--)u+=h(i,r-1,s-d+1,!1,t,n,a);for(var c=1;c<=l;c++)u+=h(i,r,c,!0,t,n,a);for(var p=new Date(i,r,l).getDay(),m=1;p<6;m++,p++)u+=h(i,r+1,m,!1,t,n,a);return u+"</div>"}(e,t,n,a),"\n    </div>\n  "),u}function m(e,t){var i,r,o,s,l,u,d,h,m,g,v;this.element=document.getElementById(e),this.currentDate=new Date,this.currentDate.setDate(1),this.selectedStartDate=null,this.selectedEndDate=null,this.options={mode:null!==(i=null==t?void 0:t.mode)&&void 0!==i?i:"single",onSelect:null!==(r=null==t?void 0:t.onSelect)&&void 0!==r?r:null,blockedDays:null!==(o=null==t?void 0:t.blockedDays)&&void 0!==o?o:[],showDayNames:null===(s=null==t?void 0:t.showDayNames)||void 0===s||s,textInputEnabled:null!==(l=null==t?void 0:t.textInputEnabled)&&void 0!==l&&l,darkMode:null!==(u=null==t?void 0:t.darkMode)&&void 0!==u&&u,usePageLanguage:null!==(d=null==t?void 0:t.usePageLanguage)&&void 0!==d&&d,usePageLanguageFallback:null!==(h=null==t?void 0:t.usePageLanguageFallback)&&void 0!==h?h:"en",language:null!=t&&t.usePageLanguage?c(null==t?void 0:t.usePageLanguageFallback):null!==(m=null==t?void 0:t.language)&&void 0!==m?m:"en",textInputPlaceholder:null!==(g=null==t?void 0:t.textInputPlaceholder)&&void 0!==g?g:a[null!=t&&t.usePageLanguage?c():null!==(v=null==t?void 0:t.language)&&void 0!==v?v:"en"]},this.init=function(){this.options.darkMode&&this.element.classList.add("dark"),this.calendarContainer=p(this.currentDate,this.isDateSelected.bind(this),this.isDateInRange.bind(this),this.options),this.options.textInputEnabled&&(this.input=document.createElement("input"),this.input.value=this.options.textInputPlaceholder,this.input.type="text",this.input.className="datepicker-input",this.input.readOnly=!0,this.element.appendChild(this.input)),this.element.appendChild(this.calendarContainer),this.render(),n(this.element,this.changeMonth.bind(this),this.handleDayClick.bind(this))},this.render=function(){this.element.innerHTML="";var e=p(this.currentDate,this.isDateSelected.bind(this),this.isDateInRange.bind(this),this.options);if(this.options.textInputEnabled&&!this.element.querySelector(".datepicker-input")){var t=document.createElement("input");if(t.value=this.options.textInputPlaceholder,t.type="text",t.id="datepicker-input",t.className="datepicker-input",t.readOnly=!0,this.selectedStartDate)if("single"===this.options.mode)t.value=this.localizedDate(this.selectedStartDate,this.options.language);else if("range"===this.options.mode){var a=this.localizedDate(this.selectedStartDate,this.options.language);this.selectedEndDate&&(a+=" - ".concat(this.localizedDate(this.selectedEndDate,this.options.language))),t.value=a}t.removeEventListener("click",t.listener),t.removeEventListener("keydown",t.listener),t.addEventListener("click",(function(){e.style.display="block"})),t.addEventListener("keydown",(function(t){"Enter"===t.key&&(e.style.display="block"===e.style.display?"none":"block")})),this.element.appendChild(t)}this.element.appendChild(e),n(this.element,this.changeMonth.bind(this),this.handleDayClick.bind(this))},this.localizedDate=function(e,t){return e.toLocaleDateString(t,{year:"numeric",month:"long",day:"numeric"})},this.isDateSelected=function(e){return this.selectedStartDate&&this.selectedStartDate.toDateString()===e.toDateString()||this.selectedEndDate&&this.selectedEndDate.toDateString()===e.toDateString()},this.isDateInRange=function(e){return this.selectedStartDate&&this.selectedEndDate&&e>this.selectedStartDate&&e<this.selectedEndDate},this.handleDayClick=function(e,n){var a=this.currentDate.getFullYear();-1===n?(n=11,a--):12===n&&(n=0,a++);var i=new Date(a,n,e);"single"===this.options.mode?(this.selectedStartDate=i,this.selectedEndDate=null,this.options.textInputEnabled&&(this.element.querySelector(".datepicker-input").value=i.toDateString()),this.triggerSelectCallback(),this.render(),t.textInputEnabled&&(this.element.querySelector(".datepicker-calendar-container").style.display="none")):"range"===this.options.mode&&(!this.selectedStartDate||this.selectedEndDate?(this.selectedStartDate=i,this.selectedEndDate=null,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block"):this.selectedStartDate&&!this.selectedEndDate&&(i>this.selectedStartDate?(this.selectedEndDate=i,this.element.querySelector(".datepicker-input")&&(this.element.querySelector(".datepicker-input").value="".concat(this.selectedStartDate.toDateString()," ").concat(void 0!==this.selectedEndDate.toDateString()?"- "+this.selectedEndDate.toDateString():"")),this.triggerSelectCallback(),this.render(),t.textInputEnabled&&(this.element.querySelector(".datepicker-calendar-container").style.display="none")):(this.selectedStartDate=i,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block")))},this.changeMonth=function(e){var t,n={currentYear:(t=this.currentDate).getFullYear(),currentMonth:t.getMonth(),currentDay:t.getDate()},a=n.currentYear,i=n.currentDay,r=new Date(a,n.currentMonth+e,1),o=new Date(a,r.getMonth()+1,0).getDate();r.setDate(Math.min(i,o)),this.currentDate=r,this.render(),this.element.querySelector(".datepicker-calendar-container").style.display="block"},this.triggerSelectCallback=function(){this.options.onSelect&&this.options.onSelect(this.selectedStartDate,this.selectedEndDate)}}return t.default})()));
\ No newline at end of file
diff --git a/dist/datepicker.css b/dist/datepicker.css
index 40e2635..f95f381 100644
--- a/dist/datepicker.css
+++ b/dist/datepicker.css
@@ -1 +1 @@
-@import url(https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap);.datepicker-calendar-container{border:1px solid #ddd}.datepicker-day{background-color:#f0f0f0}.datepicker-day:hover{background-color:#e0e0e0}.datepicker-day.in-range,.datepicker-day.selected{background-color:#4caf50;color:#fff}.datepicker-day.in-range{background-color:#a5d6a7}.datepicker-day.blocked{background-color:#f8f8f8;color:#ccc}.datepicker-day-names{background-color:#e0e0e0}.datepicker-day-names>div{color:#000}button.next-month:hover,button.prev-month:hover{background-color:#e0e0e0}.dark .datepicker-calendar-container{background-color:#222;border:1px solid #555;color:#eee}.dark .datepicker-header{border-bottom:1px solid #444}.dark .datepicker-day{background-color:#333;color:#ddd}.dark .datepicker-day:hover{background-color:#444}.dark .datepicker-day.in-range,.dark .datepicker-day.selected{background-color:#3a5fd8}.dark .datepicker-day.in-range{background-color:#5675d8}.dark .datepicker-day.blocked{background-color:#1c1c1c;color:#aaa}.dark .datepicker-day-names{background-color:#3a5fd8}.dark .datepicker-day-names>div{color:#ccc}.dark button.next-month,.dark button.prev-month{background-color:#3a5fd8;color:#ccc}.dark button.next-month:hover,.dark button.prev-month:hover{background-color:#2e4cae}.ja .datepicker-calendar-container{height:385px}.ja .datepicker-day{align-items:center;border-radius:5px;cursor:pointer;display:flex;font-size:smaller;height:50px;justify-content:center}.zh-CN .datepicker-calendar-container,.zh-TW .datepicker-calendar-container{height:385px}.zh-CN .datepicker-day,.zh-TW .datepicker-day{align-items:center;border-radius:5px;cursor:pointer;display:flex;font-size:smaller;height:50px;justify-content:center}.datepicker-input{border:1px solid #ddd;border-radius:5px;display:inline-block;font-family:Roboto,sans-serif;height:20px;padding:3px 7px}.datepicker-calendar-container{border-radius:5px;font-family:Roboto,sans-serif;margin-top:1px;padding:10px;width:275px}.datepicker-header{align-items:center;border-radius:5px;display:flex;justify-content:space-between;margin:0 0 10px;padding:5px}.datepicker-day{border-radius:50%;cursor:pointer;display:inline-block;height:30px;line-height:30px;margin:0 0 5px 5px;text-align:center;width:30px}.datepicker-day>span{display:block}.datepicker-day-names,.datepicker-week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));text-align:center}.datepicker-day-names{border-radius:5px;margin:0 3px 5px;padding:5px 0}.datepicker-day.blocked{cursor:not-allowed}button.next-month,button.prev-month{border:none;border-radius:5px;padding:5px 12px;transition:all .1s ease-in-out}
\ No newline at end of file
+@import url(https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap);.datepicker-calendar-container{border:1px solid #ddd}.datepicker-day{background-color:#f0f0f0}.datepicker-day:hover{background-color:#e0e0e0}.datepicker-day.in-range,.datepicker-day.selected{background-color:#4caf50;color:#fff}.datepicker-day.in-range{background-color:#a5d6a7}.datepicker-day.blocked{background-color:#f8f8f8;color:#ccc}.datepicker-day-names{background-color:#efefef}.datepicker-day-names>div{color:#000}button.next-month:hover,button.prev-month:hover{background-color:#e0e0e0}.dark .datepicker-calendar-container{background-color:#222;border:1px solid #555;color:#eee}.dark .datepicker-header{border-bottom:1px solid #444}.dark .datepicker-day{background-color:#333;color:#ddd}.dark .datepicker-day:hover{background-color:#444}.dark .datepicker-day.in-range,.dark .datepicker-day.selected{background-color:#3a5fd8}.dark .datepicker-day.in-range{background-color:#5675d8}.dark .datepicker-day.blocked{background-color:#1c1c1c;color:#aaa}.dark .datepicker-day-names{background-color:#3a5fd8}.dark .datepicker-day-names>div{color:#ccc}.dark button.next-month,.dark button.prev-month{background-color:#3a5fd8;color:#ccc}.dark button.next-month:hover,.dark button.prev-month:hover{background-color:#2e4cae}.ja .datepicker-calendar-container{height:385px}.ja .datepicker-day,.ko .datepicker-day{align-items:center;border-radius:5px;cursor:pointer;display:flex;font-size:smaller;height:50px;justify-content:center}.zh-CN .datepicker-calendar-container,.zh-TW .datepicker-calendar-container{height:385px}.ko .datepicker-day,.zh-CN .datepicker-day,.zh-TW .datepicker-day{align-items:center;border-radius:5px;display:flex;font-size:smaller;height:50px;justify-content:center}.datepicker-input{border:1px solid #ddd;border-radius:5px;display:inline-block;font-family:Roboto,sans-serif;height:20px;padding:3px 7px}.datepicker-calendar-container{border-radius:5px;font-family:Roboto,sans-serif;margin-top:1px;padding:10px;width:275px}.datepicker-header{align-items:center;border-radius:5px;display:flex;justify-content:space-between;margin:0 0 10px;padding:5px}.datepicker-day{border-radius:50%;cursor:pointer;display:inline-block;height:30px;line-height:30px;margin:0 0 5px 5px;text-align:center;width:30px}.datepicker-day>span{display:block}.datepicker-day-names,.datepicker-week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));text-align:center}.datepicker-day-names{border-radius:5px;margin:0 3px 5px;padding:5px 0}.datepicker-day.blocked{cursor:not-allowed}button.next-month,button.prev-month{border:none;border-radius:5px;padding:5px 12px;transition:all .1s ease-in-out}
\ No newline at end of file
diff --git a/example/index.html b/example/index.html
index 1e30e83..fab28ea 100644
--- a/example/index.html
+++ b/example/index.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="en">
+<html lang="th">
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width" />
@@ -25,7 +25,7 @@
           blockedDays: [0, 6], // Prevent Saturday and Sunday from being selected
           showDayNames: true,
           textInputEnabled: true, // Show input field, calendar displays on click
-          darkMode: false,
+          darkMode: true,
           language: 'en', // language ISO code, defaults to en -> ignored if usePageLanguage is true
           usePageLanguage: true, // Looks for a lang attribute on the page, and if the language is supported, uses it
           usePageLanguageFallback: 'en', // If usePageLanguage is true, and the page language is not supported, use this language
diff --git a/package.json b/package.json
index 194bd10..d79c2e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "easy-dates-picker",
-  "version": "0.0.21",
+  "version": "0.0.22",
   "description": "A super lightweight vanilla JS date picker",
   "main": "dist/datepicker.bundle.js",
   "files": [
@@ -10,7 +10,7 @@
     "build": "webpack",
     "test": "jest",
     "prettier": "prettier src/ --write && prettier example --write",
-    "prepare": "npm run prettier && npm run test && npm run build && git status"
+    "prep": "npm run prettier && npm run test && npm run build && git status"
   },
   "jest": {
     "moduleNameMapper": {
diff --git a/src/calendarGenerator.js b/src/calendarGenerator.js
index 6777f80..7873e0a 100644
--- a/src/calendarGenerator.js
+++ b/src/calendarGenerator.js
@@ -1,5 +1,5 @@
 import { isLeapYear } from './utils';
-import { dayNameTranslations, chineseDaysOfMonth, japaneseDaysOfMonth } from './localization';
+import { dayNameTranslations, chineseDaysOfMonth, japaneseDaysOfMonth, koreanDaysOfMonth, thaiDaysOfMonth } from './localization';
 
 export function generateDayNames(language) {
   const dayNames = dayNameTranslations[language];
@@ -47,6 +47,10 @@ export function generateDayCell(year, month, day, isCurrentMonth, isDateSelected
     dayDisplay = japaneseDaysOfMonth[day];
   } else if (options.language === 'zh-CN' || options.language === 'zh-TW') {
     dayDisplay = chineseDaysOfMonth[options.language][day];
+  } else if (options.language === 'ko') {
+    dayDisplay = koreanDaysOfMonth[day];
+  } else if (options.language === 'th') {
+    dayDisplay = thaiDaysOfMonth[day];
   }
 
   let className = isCurrentMonth ? 'datepicker-day current-month' : 'datepicker-day';
diff --git a/src/localization.js b/src/localization.js
index 101360b..77f841c 100644
--- a/src/localization.js
+++ b/src/localization.js
@@ -7,9 +7,30 @@ export const inputPlaceholderTranslations = {
   nl: 'Kies een datum',
   pt: 'Escolha uma data',
   ja: '日付を選択',
-  'zh-CN': '选择日期', // Simplified Chinese
-  'zh-TW': '選擇日期', // Traditional Chinese
+  'zh-CN': '选择日期',
+  'zh-TW': '選擇日期',
   ru: 'Выберите дату',
+  'bg-BG': 'Изберете дата',
+  cs: 'Vyberte datum',
+  da: 'Vælg en dato',
+  el: 'Επιλέξτε μια ημερομηνία',
+  fi: 'Valitse päivämäärä',
+  'hr-HR': 'Odaberite datum',
+  hu: 'Válasszon egy dátumot',
+  id: 'Pilih tanggal',
+  ko: '날짜를 선택하세요',
+  'lt-LT': 'Pasirinkite datą',
+  nb: 'Velg en dato',
+  pl: 'Wybierz datę',
+  'pt-BR': 'Escolha uma data',
+  'pt-PT': 'Escolha uma data',
+  'ro-RO': 'Alegeți o dată',
+  'sk-SK': 'Vyberte dátum',
+  'sl-SL': 'Izberite datum',
+  sv: 'Välj ett datum',
+  th: 'เลือกวันที่',
+  tr: 'Bir tarih seçin',
+  vi: 'Chọn ngày',
 };
 
 export const ariaLabels = {
@@ -21,9 +42,30 @@ export const ariaLabels = {
   nl: { prevMonth: 'Ga naar de vorige maand', nextMonth: 'Ga naar de volgende maand' },
   pt: { prevMonth: 'Ir para o mês anterior', nextMonth: 'Ir para o próximo mês' },
   ja: { prevMonth: '前の月へ', nextMonth: '次の月へ' },
-  'zh-CN': { prevMonth: '转到上一个月', nextMonth: '转到下一个月' }, // Simplified Chinese
-  'zh-TW': { prevMonth: '轉到上一個月', nextMonth: '轉到下一個月' }, // Traditional Chinese
+  'zh-CN': { prevMonth: '转到上一个月', nextMonth: '转到下一个月' },
+  'zh-TW': { prevMonth: '轉到上一個月', nextMonth: '轉到下一個月' },
   ru: { prevMonth: 'Перейти к предыдущему месяцу', nextMonth: 'Перейти к следующему месяцу' },
+  'bg-BG': { prevMonth: 'Отиди на предишния месец', nextMonth: 'Отиди на следващия месец' },
+  cs: { prevMonth: 'Přejít na předchozí měsíc', nextMonth: 'Přejít na další měsíc' },
+  da: { prevMonth: 'Gå til forrige måned', nextMonth: 'Gå til næste måned' },
+  el: { prevMonth: 'Μετάβαση στον προηγούμενο μήνα', nextMonth: 'Μετάβαση στον επόμενο μήνα' },
+  fi: { prevMonth: 'Siirry edelliseen kuukauteen', nextMonth: 'Siirry seuraavaan kuukauteen' },
+  'hr-HR': { prevMonth: 'Idi na prethodni mjesec', nextMonth: 'Idi na sljedeći mjesec' },
+  hu: { prevMonth: 'Ugrás az előző hónaphoz', nextMonth: 'Ugrás a következő hónaphoz' },
+  id: { prevMonth: 'Pergi ke bulan sebelumnya', nextMonth: 'Pergi ke bulan berikutnya' },
+  ko: { prevMonth: '이전 달로 가기', nextMonth: '다음 달로 가기' },
+  'lt-LT': { prevMonth: 'Eiti į ankstesnį mėnesį', nextMonth: 'Eiti į kitą mėnesį' },
+  nb: { prevMonth: 'Gå til forrige måned', nextMonth: 'Gå til neste måned' },
+  pl: { prevMonth: 'Przejdź do poprzedniego miesiąca', nextMonth: 'Przejdź do następnego miesiąca' },
+  'pt-BR': { prevMonth: 'Ir para o mês anterior', nextMonth: 'Ir para o próximo mês' },
+  'pt-PT': { prevMonth: 'Ir para o mês anterior', nextMonth: 'Ir para o próximo mês' },
+  'ro-RO': { prevMonth: 'Mergi la luna anterioară', nextMonth: 'Mergi la luna următoare' },
+  'sk-SK': { prevMonth: 'Prejsť na predchádzajúci mesiac', nextMonth: 'Prejsť na nasledujúci mesiac' },
+  'sl-SL': { prevMonth: 'Pojdi na prejšnji mesec', nextMonth: 'Pojdi na naslednji mesec' },
+  sv: { prevMonth: 'Gå till föregående månad', nextMonth: 'Gå till nästa månad' },
+  th: { prevMonth: 'ไปยังเดือนก่อนหน้า', nextMonth: 'ไปยังเดือนถัดไป' },
+  tr: { prevMonth: 'Önceki aya git', nextMonth: 'Sonraki aya git' },
+  vi: { prevMonth: 'Đi đến tháng trước', nextMonth: 'Đi đến tháng sau' },
 };
 
 export const monthNameTranslations = {
@@ -35,23 +77,169 @@ export const monthNameTranslations = {
   nl: ['Januari', 'Februari', 'Maart', 'April', 'Mei', 'Juni', 'Juli', 'Augustus', 'September', 'Oktober', 'November', 'December'],
   pt: ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'],
   ja: ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
-  'zh-CN': ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'], // Simplified Chinese
-  'zh-TW': ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'], // Traditional Chinese
+  'zh-CN': ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
+  'zh-TW': ['一月', '二月', '三月', '四月', '五月', '六月', '七月', '八月', '九月', '十月', '十一月', '十二月'],
   ru: ['Январь', 'Февраль', 'Март', 'Апрель', 'Май', 'Июнь', 'Июль', 'Август', 'Сентяюрь', 'Октябрь', 'Ноябрь', 'Декабрь'],
+  'bg-BG': ['Януари', 'Февруари', 'Март', 'Април', 'Май', 'Юни', 'Юли', 'Август', 'Септември', 'Октомври', 'Ноември', 'Декември'],
+  cs: ['Leden', 'Únor', 'Březen', 'Duben', 'Květen', 'Červen', 'Červenec', 'Srpen', 'Září', 'Říjen', 'Listopad', 'Prosinec'],
+  da: ['Januar', 'Februar', 'Marts', 'April', 'Maj', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'December'],
+  el: [
+    'Ιανουάριος',
+    'Φεβρουάριος',
+    'Μάρτιος',
+    'Απρίλιος',
+    'Μάιος',
+    'Ιούνιος',
+    'Ιούλιος',
+    'Αύγουστος',
+    'Σεπτέμβριος',
+    'Οκτώβριος',
+    'Νοέμβριος',
+    'Δεκέμβριος',
+  ],
+  fi: [
+    'Tammikuu',
+    'Helmikuu',
+    'Maaliskuu',
+    'Huhtikuu',
+    'Toukokuu',
+    'Kesäkuu',
+    'Heinäkuu',
+    'Elokuu',
+    'Syyskuu',
+    'Lokakuu',
+    'Marraskuu',
+    'Joulukuu',
+  ],
+  'hr-HR': [
+    'Siječanj',
+    'Veljača',
+    'Ožujak',
+    'Travanj',
+    'Svibanj',
+    'Lipanj',
+    'Srpanj',
+    'Kolovoz',
+    'Rujan',
+    'Listopad',
+    'Studeni',
+    'Prosinac',
+  ],
+  hu: [
+    'Január',
+    'Február',
+    'Március',
+    'Április',
+    'Május',
+    'Június',
+    'Július',
+    'Augusztus',
+    'Szeptember',
+    'Október',
+    'November',
+    'December',
+  ],
+  id: ['Januari', 'Februari', 'Maret', 'April', 'Mei', 'Juni', 'Juli', 'Agustus', 'September', 'Oktober', 'November', 'Desember'],
+  ko: ['1월', '2월', '3월', '4월', '5월', '6월', '7월', '8월', '9월', '10월', '11월', '12월'],
+  'lt-LT': [
+    'Sausis',
+    'Vasaris',
+    'Kovas',
+    'Balandis',
+    'Gegužė',
+    'Birželis',
+    'Liepa',
+    'Rugpjūtis',
+    'Rugsėjis',
+    'Spalis',
+    'Lapkritis',
+    'Gruodis',
+  ],
+  nb: ['Januar', 'Februar', 'Mars', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Desember'],
+  pl: ['Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień'],
+  'pt-BR': ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'],
+  'pt-PT': ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'],
+  'ro-RO': [
+    'Ianuarie',
+    'Februarie',
+    'Martie',
+    'Aprilie',
+    'Mai',
+    'Iunie',
+    'Iulie',
+    'August',
+    'Septembrie',
+    'Octombrie',
+    'Noiembrie',
+    'Decembrie',
+  ],
+  'sk-SK': ['Január', 'Február', 'Marec', 'Apríl', 'Máj', 'Jún', 'Júl', 'August', 'September', 'Október', 'November', 'December'],
+  'sl-SL': ['Januar', 'Februar', 'Marec', 'April', 'Maj', 'Junij', 'Julij', 'Avgust', 'September', 'Oktober', 'November', 'December'],
+  sv: ['Januari', 'Februari', 'Mars', 'April', 'Maj', 'Juni', 'Juli', 'Augusti', 'September', 'Oktober', 'November', 'December'],
+  th: [
+    'มกราคม',
+    'กุมภาพันธ์',
+    'มีนาคม',
+    'เมษายน',
+    'พฤษภาคม',
+    'มิถุนายน',
+    'กรกฎาคม',
+    'สิงหาคม',
+    'กันยายน',
+    'ตุลาคม',
+    'พฤศจิกายน',
+    'ธันวาคม',
+  ],
+  tr: ['Ocak', 'Şubat', 'Mart', 'Nisan', 'Mayıs', 'Haziran', 'Temmuz', 'Ağustos', 'Eylül', 'Ekim', 'Kasım', 'Aralık'],
+  vi: [
+    'Tháng Một',
+    'Tháng Hai',
+    'Tháng Ba',
+    'Tháng Tư',
+    'Tháng Năm',
+    'Tháng Sáu',
+    'Tháng Bảy',
+    'Tháng Tám',
+    'Tháng Chín',
+    'Tháng Mười',
+    'Tháng Mười Một',
+    'Tháng Mười Hai',
+  ],
 };
 
 export const dayNameTranslations = {
-  en: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'], // English
-  fr: ['Dim', 'Lun', 'Mar', 'Mer', 'Jeu', 'Ven', 'Sam'], // French
-  es: ['Dom', 'Lun', 'Mar', 'Mié', 'Jue', 'Vie', 'Sáb'], // Spanish
-  de: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'], // German
-  it: ['Dom', 'Lun', 'Mar', 'Mer', 'Gio', 'Ven', 'Sab'], // Italian
-  nl: ['Zo', 'Ma', 'Di', 'Wo', 'Do', 'Vr', 'Za'], // Dutch
-  pt: ['Dom', 'Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb'], // Portuguese
-  ja: ['日', '月', '火', '水', '木', '金', '土'], // Japanese
-  'zh-CN': ['日', '一', '二', '三', '四', '五', '六'], // Simplified Chinese
-  'zh-TW': ['日', '一', '二', '三', '四', '五', '六'], // Traditional Chinese
-  ru: ['Вс', 'Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб'], // Russian
+  en: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+  fr: ['Dim', 'Lun', 'Mar', 'Mer', 'Jeu', 'Ven', 'Sam'],
+  es: ['Dom', 'Lun', 'Mar', 'Mié', 'Jue', 'Vie', 'Sáb'],
+  de: ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'],
+  it: ['Dom', 'Lun', 'Mar', 'Mer', 'Gio', 'Ven', 'Sab'],
+  nl: ['Zo', 'Ma', 'Di', 'Wo', 'Do', 'Vr', 'Za'],
+  pt: ['Dom', 'Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb'],
+  ja: ['日', '月', '火', '水', '木', '金', '土'],
+  'zh-CN': ['日', '一', '二', '三', '四', '五', '六'],
+  'zh-TW': ['日', '一', '二', '三', '四', '五', '六'],
+  ru: ['Вс', 'Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб'],
+  'bg-BG': ['Нд', 'Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб'],
+  cs: ['Ne', 'Po', 'Út', 'St', 'Čt', 'Pá', 'So'],
+  da: ['Søn', 'Man', 'Tir', 'Ons', 'Tor', 'Fre', 'Lør'],
+  el: ['Κυρ', 'Δευ', 'Τρί', 'Τετ', 'Πέμ', 'Παρ', 'Σάβ'],
+  fi: ['Su', 'Ma', 'Ti', 'Ke', 'To', 'Pe', 'La'],
+  'hr-HR': ['Ned', 'Pon', 'Uto', 'Sri', 'Čet', 'Pet', 'Sub'],
+  hu: ['V', 'H', 'K', 'Sze', 'Cs', 'P', 'Szo'],
+  id: ['Min', 'Sen', 'Sel', 'Rab', 'Kam', 'Jum', 'Sab'],
+  ko: ['일', '월', '화', '수', '목', '금', '토'],
+  'lt-LT': ['Sek', 'Pir', 'Ant', 'Tre', 'Ket', 'Pen', 'Šeš'],
+  nb: ['Søn', 'Man', 'Tir', 'Ons', 'Tor', 'Fre', 'Lør'],
+  pl: ['N', 'Pn', 'Wt', 'Śr', 'Cz', 'Pt', 'Sob'],
+  'pt-BR': ['Dom', 'Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb'],
+  'pt-PT': ['Dom', 'Seg', 'Ter', 'Qua', 'Qui', 'Sex', 'Sáb'],
+  'ro-RO': ['Dum', 'Lun', 'Mar', 'Mie', 'Joi', 'Vin', 'Sâm'],
+  'sk-SK': ['Ne', 'Po', 'Ut', 'St', 'Št', 'Pi', 'So'],
+  'sl-SL': ['Ned', 'Pon', 'Tor', 'Sre', 'Čet', 'Pet', 'Sob'],
+  sv: ['Sön', 'Mån', 'Tis', 'Ons', 'Tor', 'Fre', 'Lör'],
+  th: ['อา.', 'จ.', 'อ.', 'พ.', 'พฤ.', 'ศ.', 'ส.'],
+  tr: ['Paz', 'Pzt', 'Sal', 'Çar', 'Per', 'Cum', 'Cts'],
+  vi: ['CN', 'T2', 'T3', 'T4', 'T5', 'T6', 'T7'],
 };
 
 export const japaneseDaysOfMonth = {
@@ -90,7 +278,6 @@ export const japaneseDaysOfMonth = {
 
 export const chineseDaysOfMonth = {
   'zh-CN': {
-    // Simplified Chinese
     1: '一',
     2: '二',
     3: '三',
@@ -124,7 +311,6 @@ export const chineseDaysOfMonth = {
     31: '三十一',
   },
   'zh-TW': {
-    // Traditional Chinese
     1: '一',
     2: '二',
     3: '三',
@@ -158,3 +344,71 @@ export const chineseDaysOfMonth = {
     31: '三十一',
   },
 };
+
+export const koreanDaysOfMonth = {
+  1: '일',
+  2: '이',
+  3: '삼',
+  4: '사',
+  5: '오',
+  6: '육',
+  7: '칠',
+  8: '팔',
+  9: '구',
+  10: '십',
+  11: '십일',
+  12: '십이',
+  13: '십삼',
+  14: '십사',
+  15: '십오',
+  16: '십육',
+  17: '십칠',
+  18: '십팔',
+  19: '십구',
+  20: '이십',
+  21: '이십일',
+  22: '이십이',
+  23: '이십삼',
+  24: '이십사',
+  25: '이십오',
+  26: '이십육',
+  27: '이십칠',
+  28: '이십팔',
+  29: '이십구',
+  30: '삼십',
+  31: '삼십일',
+};
+
+export const thaiDaysOfMonth = {
+  1: '๑',
+  2: '๒',
+  3: '๓',
+  4: '๔',
+  5: '๕',
+  6: '๖',
+  7: '๗',
+  8: '๘',
+  9: '๙',
+  10: '๑๐',
+  11: '๑๑',
+  12: '๑๒',
+  13: '๑๓',
+  14: '๑๔',
+  15: '๑๕',
+  16: '๑๖',
+  17: '๑๗',
+  18: '๑๘',
+  19: '๑๙',
+  20: '๒๐',
+  21: '๒๑',
+  22: '๒๒',
+  23: '๒๓',
+  24: '๒๔',
+  25: '๒๕',
+  26: '๒๖',
+  27: '๒๗',
+  28: '๒๘',
+  29: '๒๙',
+  30: '๓๐',
+  31: '๓๑',
+};
diff --git a/src/utils.js b/src/utils.js
index ed03306..9cc162f 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -9,7 +9,40 @@ export function isLeapYear(year) {
 }
 
 export function getPageLanguage(fallbackLang) {
-  const supportedLanguages = ['en', 'fr', 'es', 'de', 'it', 'nl', 'pt', 'ja', 'zh-CN', 'zh-TW', 'ru'];
+  const supportedLanguages = [
+    'en',
+    'fr',
+    'es',
+    'de',
+    'it',
+    'nl',
+    'pt',
+    'ja',
+    'zh-CN',
+    'zh-TW',
+    'ru',
+    'bg-BG',
+    'cs',
+    'da',
+    'el',
+    'fi',
+    'hr-HR',
+    'hu',
+    'id',
+    'ko',
+    'lt-LT',
+    'nb',
+    'pl',
+    'pt-BR',
+    'pt-PT',
+    'ro-RO',
+    'sk-SK',
+    'sl-SL',
+    'sv',
+    'th',
+    'tr',
+    'vi',
+  ];
   const documentPageLang = document.documentElement.lang;
   // Check if the page language is supported, if not, default to English
   return supportedLanguages.includes(documentPageLang) ? documentPageLang : fallbackLang;