The current procedure for adding new languages to Wikidata can be found at d:Help:Monolingual text languages.
Many requests are closed because of lack of activity; you may create a new request if you are interested in contributing a test project.
General requests for:
help from a Meta sysop or bureaucrat ·
deletion (speedy deletions: local · multilingual) ·
URL blacklisting ·
new languages ·
Personal requests for:
username changes ·
permissions (global) ·
bot status ·
adminship on Meta ·
CheckUser information (local) ·
local administrator help