In the "Language..." there is a language "Null" with the word "languages" in parentheses. It is the same as in English, but with a thin font. (Fixed in 13w24b)
Also, instead of countries in parentheses written phrases such as "fr_FR" or "sv_SE"
MC-13979
Null language and strange phrases like "fr_FR" in parentheses.
Resolved
Fixed
0
(Unassigned)
Confirmed
language, menu
Snapshot 13w16a, Snapshot 13w23b, Snapshot 13w24a, Snapshot 13w24b
Minecraft 1.6.1
Retrieved
Confirmed. The stuff in the parentheses is just standard language notation, though.