Thread:User talk:CodeCat/Template:Jpan vs. Template:lang ja

I just saw your edit to, among many others. In this particular template, the  tags italicize, which is undesirable for Japanese. prevents italicization of Japanese, even in otherwise-italicized contexts. , however, does not, so now has italicized Japanese where it shouldn't.

I haven't explored how prevented italicization, but if you have time, could you implement something similar for  when the language is Japanese?