diff --git a/binding.gyp b/binding.gyp
index fea190a..a25b57d 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -34,6 +34,16 @@
             'src/spellchecker_hunspell.cc',
           ],
         }],
+        ['OS=="win"', {
+          'sources': [
+             'src/spellchecker_win.cc'
+          ],
+        }],
+        ['OS=="linux"', {
+          'sources': [
+             'src/spellchecker_linux.cc'
+          ],
+        }],
         ['OS=="mac" and spellchecker_use_hunspell=="false"', {
           'sources': [
             'src/spellchecker_mac.mm',
diff --git a/lib/spellchecker.js b/lib/spellchecker.js
index 4646864..2584274 100644
--- a/lib/spellchecker.js
+++ b/lib/spellchecker.js
@@ -1,7 +1,30 @@
+var path = require('path');
 var bindings = require('../build/Release/spellchecker.node');
-bindings.init(__dirname);
+
+Spellchecker = bindings.Spellchecker;
+
+var defaultSpellcheck = null;
+var ensureDefaultSpellCheck = function() {
+  if (defaultSpellcheck) return;
+
+  defaultSpellcheck = new Spellchecker();
+  defaultSpellcheck.setDictionary('en_US', path.join(__dirname, '..', 'vendor', 'hunspell_dictionaries'));
+};
+
+var isMisspelled = function() {
+  ensureDefaultSpellCheck();
+
+  return defaultSpellcheck.isMisspelled.apply(defaultSpellcheck, arguments);
+};
+
+var getCorrectionsForMisspelling = function() {
+  ensureDefaultSpellCheck();
+
+  return defaultSpellcheck.getCorrectionsForMisspelling.apply(defaultSpellcheck, arguments);
+};
 
 module.exports = {
-  isMisspelled: bindings.isMisspelled,
-  getCorrectionsForMisspelling: bindings.getCorrectionsForMisspelling
+  isMisspelled: isMisspelled,
+  getCorrectionsForMisspelling: getCorrectionsForMisspelling,
+  Spellchecker: Spellchecker
 };
diff --git a/src/main.cc b/src/main.cc
index 42c751f..6a9f59a 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,49 +1,101 @@
+#include "nan.h"
 #include "spellchecker.h"
 
-#include "nan.h"
+using node::ObjectWrap;
+using namespace spellchecker;
 using namespace v8;
 
 namespace {
 
-NAN_METHOD(PlatformInit) {
-  NanScope();
-  spellchecker::Init(*String::Utf8Value(args[0]));
-  NanReturnUndefined();
-}
+class Spellchecker : public ObjectWrap {
+  SpellcheckerImplementation* impl;
 
-NAN_METHOD(IsMisspelled) {
-  NanScope();
-  if (args.Length() < 1)
-    return NanThrowError("Bad argument");
+  static NAN_METHOD(New) {
+    NanScope();
+    Spellchecker* that = new Spellchecker();
+    that->Wrap(args.This());
 
-  std::string word = *String::Utf8Value(args[0]);
-  NanReturnValue(NanNew<Boolean>(spellchecker::IsMisspelled(word)));
-}
+    NanReturnValue(args.This());
+  }
+
+  static NAN_METHOD(SetDictionary) {
+    NanScope();
+
+    if (args.Length() < 1) {
+      return NanThrowError("Bad argument");
+    }
 
-NAN_METHOD(GetCorrectionsForMisspelling) {
-  NanScope();
-  if (args.Length() < 1)
-    return NanThrowError("Bad argument");
+    Spellchecker* that = ObjectWrap::Unwrap<Spellchecker>(args.Holder());
 
-  std::string word = *String::Utf8Value(args[0]);
-  std::vector<std::string> corrections =
-    spellchecker::GetCorrectionsForMisspelling(word);
+    std::string language = *String::Utf8Value(args[0]);
+    std::string directory = ".";
+    if (args.Length() > 1) {
+      directory = *String::Utf8Value(args[1]);
+    }
 
-  Local<Array> result = NanNew<Array>(corrections.size());
-  for (size_t i = 0; i < corrections.size(); ++i) {
-    const std::string& word = corrections[i];
-    result->Set(i, NanNew<String>(word.data(), word.size()));
+    that->impl->SetDictionary(language, directory);
+    NanReturnUndefined();
   }
 
-  NanReturnValue(result);
-}
+  static NAN_METHOD(IsMisspelled) {
+    NanScope();
+    if (args.Length() < 1) {
+      return NanThrowError("Bad argument");
+    }
+
+    Spellchecker* that = ObjectWrap::Unwrap<Spellchecker>(args.Holder());
+    std::string word = *String::Utf8Value(args[0]);
+
+    NanReturnValue(NanNew<Boolean>(that->impl->IsMisspelled(word)));
+  }
+
+  static NAN_METHOD(GetCorrectionsForMisspelling) {
+    NanScope();
+    if (args.Length() < 1) {
+      return NanThrowError("Bad argument");
+    }
+
+    Spellchecker* that = ObjectWrap::Unwrap<Spellchecker>(args.Holder());
+
+    std::string word = *String::Utf8Value(args[0]);
+    std::vector<std::string> corrections =
+      that->impl->GetCorrectionsForMisspelling(word);
+
+    Local<Array> result = NanNew<Array>(corrections.size());
+    for (size_t i = 0; i < corrections.size(); ++i) {
+      const std::string& word = corrections[i];
+      result->Set(i, NanNew<String>(word.data(), word.size()));
+    }
+
+    NanReturnValue(result);
+  }
+
+  Spellchecker() {
+    impl = SpellcheckerFactory::CreateSpellchecker();
+  }
+
+  // actual destructor
+  virtual ~Spellchecker() {
+    delete impl;
+  }
+
+ public:
+  static void Init(Handle<Object> exports) {
+    Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(Spellchecker::New);
+
+    tpl->SetClassName(NanSymbol("Spellchecker"));
+    tpl->InstanceTemplate()->SetInternalFieldCount(1);
+
+    NODE_SET_METHOD(tpl->InstanceTemplate(), "setDictionary", Spellchecker::SetDictionary);
+    NODE_SET_METHOD(tpl->InstanceTemplate(), "getCorrectionsForMisspelling", Spellchecker::GetCorrectionsForMisspelling);
+    NODE_SET_METHOD(tpl->InstanceTemplate(), "isMisspelled", Spellchecker::IsMisspelled);
+
+    exports->Set(NanNew("Spellchecker"), tpl->GetFunction());
+  }
+};
 
-void Init(Handle<Object> exports) {
-  NODE_SET_METHOD(exports, "init", PlatformInit);
-  NODE_SET_METHOD(exports, "isMisspelled", IsMisspelled);
-  NODE_SET_METHOD(exports,
-                  "getCorrectionsForMisspelling",
-                  GetCorrectionsForMisspelling);
+void Init(Handle<Object> exports, Handle<Object> module) {
+  Spellchecker::Init(exports);
 }
 
 }  // namespace
diff --git a/src/spellchecker.h b/src/spellchecker.h
index 8d9a7ec..e8a48ee 100644
--- a/src/spellchecker.h
+++ b/src/spellchecker.h
@@ -6,14 +6,23 @@
 
 namespace spellchecker {
 
-// Initializes everything.
-void Init(const std::string& dirname);
+class SpellcheckerImplementation {
+public:
+  virtual void SetDictionary(const std::string& language, const std::string& path) = 0;
 
-// Returns true if the word is misspelled.
-bool IsMisspelled(const std::string& word);
+  // Returns an array containing possible corrections for the word.
+  virtual std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word) = 0;
 
-// Returns an array containing possible corrections for the word.
-std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word);
+  // Returns true if the word is misspelled.
+  virtual bool IsMisspelled(const std::string& word) = 0;
+
+  virtual ~SpellcheckerImplementation() {}
+};
+
+class SpellcheckerFactory {
+public:
+  static SpellcheckerImplementation* CreateSpellchecker();
+};
 
 }  // namespace spellchecker
 
diff --git a/src/spellchecker_hunspell.cc b/src/spellchecker_hunspell.cc
index a6b4cdb..e55a939 100644
--- a/src/spellchecker_hunspell.cc
+++ b/src/spellchecker_hunspell.cc
@@ -1,38 +1,44 @@
-#include "spellchecker.h"
-
 #include "../vendor/hunspell/src/hunspell/hunspell.hxx"
 
+#include "spellchecker_hunspell.h"
+
 namespace spellchecker {
 
-namespace {
+HunspellSpellchecker::HunspellSpellchecker() {
+  this->hunspell = NULL;
+}
 
-Hunspell* g_hunspell = NULL;
+HunspellSpellchecker::~HunspellSpellchecker() {
+  if (!this->hunspell) return;
 
-}  // namespace
+  delete this->hunspell;
+}
 
-void Init(const std::string& dirname) {
-  if (g_hunspell != NULL)
-    return;
+void HunspellSpellchecker::SetDictionary(const std::string& language, const std::string& dirname) {
+  if (hunspell != NULL) {
+    delete this->hunspell;
+  }
 
-  std::string affixpath = dirname + "/../vendor/hunspell_dictionaries/en_US.aff";
-  std::string dpath = dirname + "/../vendor/hunspell_dictionaries/en_US.dic";
-  g_hunspell = new Hunspell(affixpath.c_str(), dpath.c_str());
+  std::string affixpath = dirname + "/" + language + ".aff";
+  std::string dpath = dirname + "/" + language + ".dic";
+  this->hunspell = new Hunspell(affixpath.c_str(), dpath.c_str());
 }
 
-bool IsMisspelled(const std::string& word) {
-  return g_hunspell->spell(word.c_str()) == 0;
+bool HunspellSpellchecker::IsMisspelled(const std::string& word) {
+  return this->hunspell->spell(word.c_str()) == 0;
 }
 
-std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word) {
+std::vector<std::string> HunspellSpellchecker::GetCorrectionsForMisspelling(const std::string& word) {
   std::vector<std::string> corrections;
   char** slist;
-  int size = g_hunspell->suggest(&slist, word.c_str());
+  int size = hunspell->suggest(&slist, word.c_str());
 
   corrections.reserve(size);
-  for (int i = 0; i < size; ++i)
+  for (int i = 0; i < size; ++i) {
     corrections.push_back(slist[i]);
+  }
 
-  g_hunspell->free_list(&slist, size);
+  this->hunspell->free_list(&slist, size);
   return corrections;
 }
 
diff --git a/src/spellchecker_hunspell.h b/src/spellchecker_hunspell.h
new file mode 100644
index 0000000..7a9a515
--- /dev/null
+++ b/src/spellchecker_hunspell.h
@@ -0,0 +1,25 @@
+#ifndef SRC_SPELLCHECKER_HUNSPELL_H_
+#define SRC_SPELLCHECKER_HUNSPELL_H_
+
+#include "spellchecker.h"
+
+class Hunspell;
+
+namespace spellchecker {
+
+class HunspellSpellchecker : public SpellcheckerImplementation {
+public:
+  HunspellSpellchecker();
+  ~HunspellSpellchecker();
+
+  void SetDictionary(const std::string& language, const std::string& path);
+  std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word);
+  bool IsMisspelled(const std::string& word);
+
+private:
+  Hunspell* hunspell;
+};
+
+}  // namespace spellchecker
+
+#endif  // SRC_SPELLCHECKER_MAC_H_
diff --git a/src/spellchecker_linux.cc b/src/spellchecker_linux.cc
new file mode 100644
index 0000000..e5ab00b
--- /dev/null
+++ b/src/spellchecker_linux.cc
@@ -0,0 +1,10 @@
+#include "spellchecker.h"
+#include "spellchecker_hunspell.h"
+
+namespace spellchecker {
+
+SpellcheckerImplementation* SpellcheckerFactory::CreateSpellchecker() {
+  return new HunspellSpellchecker();
+}
+
+}  // namespace spellchecker
diff --git a/src/spellchecker_mac.h b/src/spellchecker_mac.h
new file mode 100644
index 0000000..ad92082
--- /dev/null
+++ b/src/spellchecker_mac.h
@@ -0,0 +1,17 @@
+#ifndef SRC_SPELLCHECKER_MAC_H_
+#define SRC_SPELLCHECKER_MAC_H_
+
+#include "spellchecker.h"
+
+namespace spellchecker {
+
+class MacSpellchecker : public SpellcheckerImplementation {
+public:
+  void SetDictionary(const std::string& language, const std::string& path);
+  std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word);
+  bool IsMisspelled(const std::string& word);
+};
+
+}  // namespace spellchecker
+
+#endif  // SRC_SPELLCHECKER_MAC_H_
diff --git a/src/spellchecker_mac.mm b/src/spellchecker_mac.mm
index 73f4057..1d53fe3 100644
--- a/src/spellchecker_mac.mm
+++ b/src/spellchecker_mac.mm
@@ -1,14 +1,14 @@
-#include "spellchecker.h"
+#include "spellchecker_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #import <dispatch/dispatch.h>
 
 namespace spellchecker {
 
-void Init(const std::string& dirname) {
+void MacSpellchecker::SetDictionary(const std::string& language, const std::string& path) {
 }
 
-bool IsMisspelled(const std::string& word) {
+bool MacSpellchecker::IsMisspelled(const std::string& word) {
   bool result;
 
   @autoreleasepool {
@@ -23,7 +23,7 @@ bool IsMisspelled(const std::string& word) {
   return result;
 }
 
-std::vector<std::string> GetCorrectionsForMisspelling(const std::string& word) {
+std::vector<std::string> MacSpellchecker::GetCorrectionsForMisspelling(const std::string& word) {
   std::vector<std::string> corrections;
 
   @autoreleasepool {
@@ -47,4 +47,8 @@ bool IsMisspelled(const std::string& word) {
   return corrections;
 }
 
+SpellcheckerImplementation* SpellcheckerFactory::CreateSpellchecker() {
+  return new MacSpellchecker();
+}
+
 }  // namespace spellchecker
diff --git a/src/spellchecker_win.cc b/src/spellchecker_win.cc
new file mode 100644
index 0000000..e5ab00b
--- /dev/null
+++ b/src/spellchecker_win.cc
@@ -0,0 +1,10 @@
+#include "spellchecker.h"
+#include "spellchecker_hunspell.h"
+
+namespace spellchecker {
+
+SpellcheckerImplementation* SpellcheckerFactory::CreateSpellchecker() {
+  return new HunspellSpellchecker();
+}
+
+}  // namespace spellchecker