All languages used in are listed in the sub-category Languages by code. Language codes are used to reference all message translations, portals, and user categories.

If you don't know which code to use, you may lookup languages by by their family, or by their name (in English) or by country or region in which they have a recognized minority status, including the countries or regions where the usage is official (nationally or in a subdivision) or used de facto as a majority language.