I am currently in the process of translating a lecture on the étale topology by John Hubbard from French into English (and from transparencies into Beamer). For the most part, the translation is going smoothly, but sometimes I wish I had more resources for translating technical terms.

Now I'm wondering: what are some resources which you have found useful for mathematical translation? For a given language, what are some of the tricky terms which deviate the most from English?