This could be a real stupid question on my part, but I read the rules about the foreign language usage and found nothing about it..
Can pets have names that are in a foreign language?
I've seen several pets with names in a foreign language, so it seems like it's okay within reason. Like... I imagine you'll get in trouble for using a word you can't use as a pet name in English.
You just can't use foreign language on public parts of the site, ie. forums, commments, etc.
Shop + pet names in other languages are a-ok! Mine are :)