The tagline on this page:
“The most popular WordPress.com blogs are ranked here according to a special formula.” http://botd.wordpress.com/?lang=de
is not translated, althoug the string is translated in GlotPress since 2009:
Torsten, this is happening not just with German, but with all the languages. I reported to developers but as BOTD is not being highly exposed, I am not sure how far it is going to end up on their list.