Hi again Backov, 
This article isn’t about localizing your game but creating a game “ready for localization”, which in UE4 really just means “use FText”.
While we don’t have documentation posted yet, it is in the works. I can probably post a preview of the documentation here on the forums soon (this week). The preview would just be lacking the iteration and review provided by our documentation team here at Epic, but should still be very helpful.
There are other posts on the forums with information regarding how to gather for loc and what to translate. Localization is Very Important you’ll want to look towards the bottom/mid for the details.