Does not add the language in beta 3 (github last update 02.03.17)

[motosimak]

Translated from Google translator: Installed Beta 2 (OK) after switching to Beta 3 (github as of 02/03/2017) does not add a new language, only English, in the language settings section. Optional: Css files are not edited (writes - there are not enough permissions to edit files) and mods (optimus brave) does not work.

The problem is on two different servers for different people. How can I fix this?

PHP: 5.4-7

[Antes]

Since we didn't release beta3 officially, our site does not have language files for Beta3 so its normal that SMF only offering english or beta2 language files to you.

[motosimak]

In other words, the installation of language files through the language panel is impossible because of their absence for beta 3? Manually renaming the language files for beta 3 does not work. When selecting languages, only English is available.

I tried to install German, Russian or English utf-8, in any case the installed languages ​​are not visible in the language bar, although they are physically present in the folder.

[Kindred]

Also... most 2.0 mods will probably NOT work with 2.1