Add-on Language-specific content(bbcode)

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Hi everyone, I'm need bbcode like this:
[language=en-US]
some content in English, may content another bbcodes
[/language]

[language=ru-RU]
some content in Russian, may content another bbcodes
[/language]

[language=fr-FR]
some content in French, may content another bbcodes
[/language]

The idea is to have all translations in one post, and display content based on selected forum language

I can pay some donation