Feat/reworked language codes (#865)

* Reworked language codes to use Steam localization standards

* Reworked language codes tweaks (#864)

* Language code rework tweaks

* Update bg.lua

* Reevaluate whether a language is WIP

* Update bg.lua

* Even better mark for languages as WIP (> 80% translated)

* Update zh_cn.lua

* Update cs.lua

* Fix for game language codes

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Co-authored-by: kittenchilly <mario.pikmin.zelda@gmail.com>

descriptions/ab+/ru.lua

@@ -13,10 +13,11 @@ local languageCode = "ru"
 -- init ru table
 EID.descriptions[languageCode] = {}
 EID.descriptions[languageCode].custom = {} -- table for custom entity descriptions
-EID.descriptions[languageCode].languageName = "Russian"
+EID.descriptions[languageCode].languageName = "Russian (WIP)"
+EID.descriptions[languageCode].alternativeLanguageCodes = {"russian"}
 
 -- Fonts to be used with this language pack
-EID.descriptions[languageCode].fonts = EID.descriptions["en_us"].fonts
+EID.descriptions[languageCode].fonts = EID.descriptions["en"].fonts
 
 ---------- Collectibles ----------
 EID.descriptions[languageCode].collectibles={