Recently I flew BHX / FRA using LH, on a flight operated by bmi.
There was just one cabin crew member who spoke German, and even to my (english) ear her German wasn't up to the mark - the safety announcement was barely intelligable, the pronounciation was so bad.
Surely Lufthansa would expect better.
On the otherhand, it is amazing to hear UK (British) KLM cabin crew speaking Dutch so fluently.
We British need to start learning European languages, not just to work as CC, but also to help UK plc export!