Thread:Talk:Universal Language Selector/Several problems with web fonts/reply (3)

What general issue? I'm not aware of a general issue. People seem to be mostly using language codes correctly.

The RFC says: The format of the tags and subtags in the registry is RECOMMENDED. In this format, all non-initial two-letter subtags are uppercase, all non-initial four-letter subtags are titlecase, and all other subtags are lowercase. Hence  is incorrect, I don't see why the template shouldn't fix it. Sure, the RFC also states "All comparisons MUST be performed in a case-insensitive manner" (which could be an issue for the extension or for core), I was merely giving a practical suggestion about that specific case.