How to change the initial language?

[DarkLimone]

How to change the initial language?
I have tried with, in screens :

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init -3 python:
    if persistent.lang is None:
        persistent.lang = "english"
    lang = persistent.lang

but it does not work

[xavimat]

"persistent.lang" is not a renpy variable. Neither "lang" is. Those variables don't do anything to the translation system of renpy.

1. You need a None language, that is the original language the game is created. I'm assuming your game is not in originally in English.

2. Usually we put a "change language" option in the preferences screen. Look at the screen.rpy file. You can add the following:

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vbox:
    style_prefix "check"
    label _("Language")
    textbutton "Original language" action Language(None)
    textbutton "English" action Language("english")

3. It's usual to ask the player's preferred language, the first time they open the game. You can do that this way:

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label splashscreen:
    if not persistent.lang_selected:
        menu:
            "Original language":
                $ persistent.lang_selected = True
            "English":
                $ persistent.lang_selected = True
                $ renpy.change_language("english")
    return

Here, you see the persistent.lang_selected variable. It does nothing to the translation itself, only ensures that this menu is shown only once (the first time the game is executed).
The functions and actions that actually renpy uses for the selection of language are: renpy.change_language(), Language()