Unless they're German,
The Big Bang Theory Season 7, Episode 12
If I give the right command in German,
she'll rip your face off.
The Big Bang Theory Season 6, Episode 21
What's German for "annoying"?
The Big Bang Theory Season 12, Episode 7
Quartz, from the
German "quarz"
The Big Bang Theory Season 12, Episode 2
Now, in German.
The Big Bang Theory Season 10, Episode 20