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/rep/pt_br.lua

@@ -3,7 +3,7 @@
 -----  By: LuanRoger, NotZin0 and JorgeLNJunior  -----
 ------------------------------------------------------
 
--- Last Sync with en_us: 13.06.2022
+-- Last Sync with English: 13.06.2022
 
 -- FORMAT: Item ID | Name| Description
 -- '#' = starts new line of text