Is possible to translate instalation script, OS, interface to other language?
For example using this https://weblate.org/
only open Source OS, not all
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Good point, will add that to my fork of the launcher (what is your native language btw?)
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Polish
is other way, https://pontoon.mozilla.org/ and tatoeba 
here is link to others https://opensource.com/article/17/6/open-source-localization-tools
In the past I joined https://www.transifex.com to translate the package manager of Sabayon Linux.
It´s a paid service but free for open source. Weblate looks pretty much like what I remember transifex was.