Is there some env variable like GIT_LANG (like LANG)?

Hello list,

I'm from Germany, but nevertheless I prefer my Git to talk English, esp.
Gitk and Git Gui. I appreciate that people translate it into
so many languages, but personally I'm totally helpless with a German git 
gui.

I know I can set LANG=en_US (that's what I actually do), but that
affects other applications as well. Is there some environment variable
like GIT_LANG or so? According to the manpages, there isn't.

What would you think of it?

Dirk