Board Thread:Support Requests - Getting Technical/@comment-35896583-20180704121512/@comment-168424-20180704173525

It would help if you told us the wiki and the international extension type, but here are some basics:

You would create a new wiki with a subdomain like lc.origwikiname where lc is the language code of the language you are trying to make.

See List of ISO 639-1 codes for the codes.