diff --git a/.gitignore b/.gitignore
index 57f1cb2..fbe3fdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-/.idea/
\ No newline at end of file
+/.idea/
+/option.json
diff --git a/main.pyw b/main.pyw
index b37acc9..46447d5 100644
--- a/main.pyw
+++ b/main.pyw
@@ -1,8 +1,15 @@
-from source.gui import install
 import sys
 
+from source.gui import install
+from source.option import Option
+from source.translation import load_language
+
+
 # this allows every variable to be accessible from other files, useful for the plugins
 self = sys.modules[__name__]
 
-self.window = install.Window()
+options = Option.from_file("./option.json")
+translater = load_language(options["language"])
+
+self.window = install.Window(options)
 self.window.run()
diff --git a/source/__init__.py b/source/__init__.py
index fca8e91..606939f 100644
--- a/source/__init__.py
+++ b/source/__init__.py
@@ -1,3 +1,5 @@
+import os
+import sys
 from threading import Thread
 from typing import Callable
 
@@ -28,3 +30,10 @@ def threaded(func: Callable) -> Callable:
         Thread(target=func, args=args, kwargs=kwargs, daemon=True).start()
 
     return wrapper
+
+
+def restart_program():
+    """
+    Restart the program
+    """
+    os.execl(sys.executable, sys.executable, *sys.argv)
diff --git a/source/gui/__init__.py b/source/gui/__init__.py
index 86092cb..32be3cf 100644
--- a/source/gui/__init__.py
+++ b/source/gui/__init__.py
@@ -1,7 +1,6 @@
 import traceback
 from tkinter import messagebox
 from typing import Callable
-
 from source.translation import translate as _
 
 
@@ -12,6 +11,6 @@ def better_gui_error(func: Callable) -> Callable:
 
     def wrapper(*args, **kwargs):
         try: return func(*args, **kwargs)
-        except: messagebox.showerror(_("ERROR"), traceback.format_exc())
+        except: messagebox.showerror(_("Error"), traceback.format_exc())
 
-    return wrapper
\ No newline at end of file
+    return wrapper
diff --git a/source/gui/install.py b/source/gui/install.py
index f24baff..8ca41c8 100644
--- a/source/gui/install.py
+++ b/source/gui/install.py
@@ -12,6 +12,7 @@ from typing import Generator
 from source.gui import better_gui_error
 from source.mkw.Game import Game
 from source.mkw.ModConfig import ModConfig
+from source.option import Option
 from source.translation import translate as _
 from source import event
 from source import *
@@ -35,9 +36,11 @@ class InstallerState(enum.Enum):
 
 # Main window for the installer
 class Window(tkinter.Tk):
-    def __init__(self):
+    def __init__(self, options: Option):
         super().__init__()
 
+        self.options: Option = options
+
         self.title(_("INSTALLER_TITLE"))
         self.resizable(False, False)
         self.iconbitmap("./assets/icon.ico")
@@ -141,8 +144,15 @@ class Menu(tkinter.Menu):
 
             master.add_cascade(label=_("LANGUAGE_SELECTION"), menu=self)
 
+            def callback(file: Path):
+                def func(): self.master.master.options["language"] = file.stem
+                return func
+
             for file in Path("./assets/language/").iterdir():
-                self.add_command(label=json.loads(file.read_text(encoding="utf8"))["name"])
+                self.add_command(
+                    label=json.loads(file.read_text(encoding="utf8"))["name"],
+                    command=callback(file)
+                )
 
     # Track configuration menu
     class TrackConfiguration(tkinter.Menu):
diff --git a/source/mkw/Track.py b/source/mkw/Track.py
index 6241900..c0b8cf7 100644
--- a/source/mkw/Track.py
+++ b/source/mkw/Track.py
@@ -37,6 +37,8 @@ class Track:
 
         # others not mandatory attributes
         for key, value in kwargs.items():
+            # if the attribute start with __, this is a magic attribute, and it should not be modified
+            if key.startswith("__"): continue
             setattr(self, key, value)
 
     @classmethod
diff --git a/source/option.py b/source/option.py
new file mode 100644
index 0000000..a93c3b6
--- /dev/null
+++ b/source/option.py
@@ -0,0 +1,77 @@
+import json
+from pathlib import Path
+
+from source import restart_program
+
+
+class Option:
+    __slots__ = ("_path", "_options")
+
+    reboot_on_change: list[any] = ["language"]
+    default_options: dict[str, any] = {
+        "language": "en"
+    }
+
+    def __init__(self, language=None):
+        self._path: Path | None = None
+        self._options: dict[str, any] = self.default_options.copy()
+        if language is not None: self._options["language"] = language
+
+    def __getitem__(self, key: str) -> any:
+        """
+        get an options value from its key
+        :param key: the option name
+        :return: the value of the option
+        """
+        return self._options[key]
+
+    def __setitem__(self, key: str, value: any) -> None:
+        """
+        change the value of an options for a key, if the options have been loaded from a file, save it inside
+        if the option is in the reboot_on_change list, reboot the program
+        :param key: the name of the option to edit
+        :param value: the value of the option
+        :return:
+        """
+        self._options[key] = value
+        if self._path: self.save()
+        if key in self.reboot_on_change: restart_program()
+
+    def save(self, option_file: Path | str = None) -> None:
+        """
+        save the options to the file
+        :return: None
+        """
+        if option_file is None: option_file = self._path
+        if isinstance(option_file, str): option_file = Path(option_file)
+
+        with option_file.open("w") as file:
+            json.dump(self._options, file, indent=4, ensure_ascii=False)
+
+    @classmethod
+    def from_dict(cls, option_dict: dict) -> "Option":
+        """
+        Create a Option from a dict if the parameters are in the default_options
+        :param option_dict: dict containing the configuration
+        :return: Option
+        """
+        kwargs = {}
+        for key in cls.default_options.keys():
+            if "key" in option_dict: kwargs[key] = option_dict[key]
+
+        return cls(**kwargs)
+
+    @classmethod
+    def from_file(cls, option_file: str | Path) -> "Option":
+        """
+        Loads the option from a file. If the option file does not exist, only load default configuration
+        :param option_file: the option file
+        :return: Option
+        """
+        if isinstance(option_file, str): option_file = Path(option_file)
+
+        if not option_file.exists(): obj = cls()
+        else: obj = cls.from_dict(json.loads(option_file.read_text(encoding="utf8")))
+
+        obj._path = option_file
+        return obj
diff --git a/source/translation.py b/source/translation.py
index 4e24f9f..a503fc7 100644
--- a/source/translation.py
+++ b/source/translation.py
@@ -1,8 +1,19 @@
 import json
+import sys
 from pathlib import Path
 
 
-language_data = json.loads(Path("./assets/language/en.json").read_text(encoding="utf8"))
+self = sys.modules[__name__]
+self._language_data = {}
+
+
+def load_language(language: str):
+    """
+    Load a language file.
+    :param language: language code to load
+    :return:
+    """
+    self._language_data = json.loads(Path(f"./assets/language/{language}.json").read_text(encoding="utf8"))
 
 
 def translate(*text) -> str:
@@ -11,4 +22,8 @@ def translate(*text) -> str:
     :param text: list of text to translate
     :return: translated text
     """
-    return "".join([language_data["translation"].get(word, word) for word in text])
+    return "".join([self._language_data["translation"].get(word, word) for word in text])
+
+
+
+