diff --git a/source/gui/install.py b/source/gui/install.py
index 4752cc5..b360ae4 100644
--- a/source/gui/install.py
+++ b/source/gui/install.py
@@ -150,16 +150,20 @@ class Menu(tkinter.Menu):
     class Language(tkinter.Menu):
         def __init__(self, master: tkinter.Menu):
             super().__init__(master, tearoff=False)
-
             master.add_cascade(label=_("LANGUAGE_SELECTION"), menu=self)
 
+            self.variable = tkinter.StringVar(value=self.master.master.options["language"])
+
             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"],
+                lang_json = json.loads(file.read_text(encoding="utf8"))
+                self.add_radiobutton(
+                    label=lang_json["name"],
+                    value=file.stem,
+                    variable=self.variable,
                     command=callback(file)
                 )
 
@@ -179,6 +183,27 @@ class Menu(tkinter.Menu):
             master.add_cascade(label=_("ADVANCED_CONFIGURATION"), menu=self)
             self.add_command(label="Debug mode")
 
+            self.threads_used = self.ThreadsUsed(self)
+
+        class ThreadsUsed(tkinter.Menu):
+            def __init__(self, master: tkinter.Menu):
+                super().__init__(master, tearoff=False)
+                master.add_cascade(label=_("THREADS_USED"), menu=self)
+
+                self.variable = tkinter.IntVar(value=self.master.master.master.options["threads"])
+
+                def callback(threads_amount: int):
+                    def func(): self.master.master.master.options["threads"] = threads_amount
+                    return func
+
+                for i in [1, 2, 4, 8, 12, 16]:
+                    self.add_radiobutton(
+                        label=_("USE", f" {i} ", "THREADS"),
+                        value=i,
+                        variable=self.variable,
+                        command=callback(i),
+                    )
+
     # Help menu
     class Help(tkinter.Menu):
         def __init__(self, master: tkinter.Menu):
@@ -377,7 +402,14 @@ class ButtonInstall(ttk.Button):
             game = Game(source_path)
             mod_config = self.master.get_mod_config()
             output_type = self.master.get_output_type()
-            self.master.progress_function(game.install_mod(destination_path, mod_config, output_type))
+            self.master.progress_function(
+                game.install_mod(
+                    dest=destination_path,
+                    mod_config=mod_config,
+                    output_type=output_type,
+                    options=self.master.options
+                )
+            )
 
         finally:
             self.master.set_state(InstallerState.IDLE)
diff --git a/source/mkw/Game.py b/source/mkw/Game.py
index a2f6b63..740c672 100644
--- a/source/mkw/Game.py
+++ b/source/mkw/Game.py
@@ -3,6 +3,7 @@ from typing import Generator
 
 from source.mkw.ExtractedGame import ExtractedGame
 from source.mkw.ModConfig import ModConfig
+from source.option import Option
 from source.wt.wit import WITPath, Region, Extension
 
 
@@ -87,11 +88,13 @@ class Game:
 
         return extracted_game
 
-    def install_mod(self, dest: Path, mod_config: ModConfig, output_type: Extension) -> Generator[dict, None, None]:
+    def install_mod(self, dest: Path, mod_config: ModConfig, options: "Option", output_type: Extension
+                    ) -> Generator[dict, None, None]:
         """
         Patch the game with the mod
         :dest: destination directory
         :mod_config: mod configuration
+        :options: others options for customized installation
         :output_type: type of the destination game
         """
         # create a cache directory for some files
@@ -122,7 +125,7 @@ class Game:
             cache_autoadd_directory,
             cache_cttracks_directory,
             cache_ogtracks_directory,
-            8
+            options["threads"],
         )
 
         # patch the game
diff --git a/source/option.py b/source/option.py
index 6f69cef..aaaa91b 100644
--- a/source/option.py
+++ b/source/option.py
@@ -7,15 +7,21 @@ from source import restart_program
 class Option:
     __slots__ = ("_path", "_options")
 
-    reboot_on_change: list[any] = ["language"]
+    reboot_on_change: list[str] = [
+        "language",
+    ]
+
     default_options: dict[str, any] = {
-        "language": "en"
+        "language": "en",
+        "threads": 8,
     }
 
-    def __init__(self, language=None):
+    def __init__(self, **options):
         self._path: Path | None = None
         self._options: dict[str, any] = self.default_options.copy()
-        if language is not None: self._options["language"] = language
+
+        for option_name, option_value in options.items():
+            self._options[option_name] = option_value
 
     def __getitem__(self, key: str) -> any:
         """
@@ -55,11 +61,7 @@ class Option:
         :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)
+        return cls(**option_dict)
 
     @classmethod
     def from_file(cls, option_file: str | Path) -> "Option":
diff --git a/source/translation.py b/source/translation.py
index a503fc7..9857532 100644
--- a/source/translation.py
+++ b/source/translation.py
@@ -22,7 +22,11 @@ def translate(*text) -> str:
     :param text: list of text to translate
     :return: translated text
     """
-    return "".join([self._language_data["translation"].get(word, word) for word in text])
+    return "".join([
+        self._language_data["translation"].get(word, word) if isinstance(word, str)
+        else str(word)
+        for word in text
+    ])