Locales on LibreOffice

HI, I’ve built LIbreOffice from source and now I want to add my langauge to my buitl Office: Where is locales of LIbreOffice and how can I add locales created by me.How to switch user interface language from english to my language.

Development-related questions should be asked on development mailing list, or on #libreoffice-dev IRC (FreeNode).

Thank you very much