The following languages may have legacy codes used in Wikimedia wikis for themselves, or for one of their variants.
The new policy for languages in Wikimedia should prohibit new additions. These codes are still kept on translatewiki.net as long as the migration of these wikis (a few of them for some linguistic editions of Wikipedia, or for variants used in local user preferences on these wikis) to use BCP 47-conforming codes has not been completed. Please do not use these codes in other projects
(or at least inform the maintainers of translatewiki.net if you have accidently reused these codes for your project, so that they can know you still need them).