Note that I changed the language names to lookup from {lang}-{region} instead of
just {lang}, because Genshin Impact supports both zh-cn and zh-tw locales.
zh-tw's tranlsation is different zh-cn.
This commit adds the translation and registers the language in the code,
so that french translations show up in the launcher.
This translation, though not perfect should be understandable to most
French speakers :) If you have any comments or suggestion, feel free to
leave them here!
Standard German language code is `de` but game API requires it to be `de-de`.
With this change formatted locales always will have
region so always will fit game requirements
Improved `i18n` mod to list supported languages and some other stuff
As well was added `get_default_lang` function
which will return language key based on current system language.
This function is called at the first launcher start
to update default `launcher.language` config property, so user will immediately
have proper language in initial setup window
