Thread:Talk:Universal Language Selector/Several problems with web fonts/reply (2)

Converting the annotations as a whole to lowercase is going against the recommendations of RFC4646 and the therein mentioned ISO standards w.r.t. to the format of each annotation part. It is the responsibility of the implementations (here the Universal Language Selector) making use of the annotations to treat them internally as case-insensitive. Additionally, your proposal would only address this singular issue with this very template, but neither other templates using language annotation nor where language annotation is done without templates, and thus not solve the general issue.