Feat: Add build_lang helper in utils

AUTHORS.rst

@@ -50,6 +50,7 @@ Contributors
 * PetrDlouhy
 * dmarcelino
 * GreyZmeem
+* Hugo Defrance
 * And many more ... (if you miss your name here, please let us know!)
 
 .. _django-linguo: https://github.com/zmathew/django-linguo

modeltranslation/tests/tests.py

@@ -33,6 +33,7 @@
 from modeltranslation.utils import (
     auto_populate,
     build_css_class,
+    build_lang,
     build_localized_fieldname,
     fallbacks,
 )
@@ -1182,6 +1183,12 @@ def test_indonesian(self):
         field = models.ForeignKeyModel._meta.get_field("test")
         assert field.attname != build_localized_fieldname(field.name, "id")
 
+    def test_build_lang(self):
+        assert build_lang("en") == "en"
+        assert build_lang("en_en") == "en_en"
+        assert build_lang("en-en") == "en_en"
+        assert build_lang("id") == "ind"
+
 
 class ManyToManyFieldsTest(ModeltranslationTestBase):
     @classmethod

modeltranslation/utils.py

@@ -51,12 +51,16 @@ def get_translation_fields(field: str) -> list[str]:
     return [build_localized_fieldname(field, lang) for lang in settings.AVAILABLE_LANGUAGES]
 
 
-def build_localized_fieldname(field_name: str, lang: str) -> str:
+def build_lang(lang: str) -> str:
     if lang == "id":
         # The 2-letter Indonesian language code is problematic with the
         # current naming scheme as Django foreign keys also add "id" suffix.
         lang = "ind"
-    return str("%s_%s" % (field_name, lang.replace("-", "_")))
+    return lang.replace("-", "_")
+
+
+def build_localized_fieldname(field_name: str, lang: str) -> str:
+    return str("%s_%s" % (field_name, build_lang(lang)))
 
 
 def _build_localized_verbose_name(verbose_name: Any, lang: str) -> str: