How to get MUI location?

[WojTec]

I need to know location of MUI package for actual language on Vista+. These folders are in \System32, but problem is how to get path for actual used languge, because foder name is language symbol, not it ID, eg:

C:\Windows\System32\en-US\

I need get this path, because I must get some strings from DLLs inside.

Or other way is translate LCID to language symbol, eg. $0429 --> "en-US", but how?

[Assarbad]

How about GetUILanguageInfo and friends?