See image below, I don't remember what this text should be, but it was in English the last time I went to the site. (rev 2013.12.16.1237 - not sure about this number, I might have copied the wrong window)
Oops. This was cached in our global cache without respect for language in the cache key. It's fixed in the next build (rolling out now).
I'm sure there are more of these we never thought of since it wasn't a problem before...they'll be fun.