TV series example of the word

The Big Bang Theory Season 5, Episode 7
You know, the German philosopher,

The Big Bang Theory Season 1, Episode 16
...and I could smell German chocolate cake, which is my favorite.
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The Big Bang Theory Season 10, Episode 20
Now, in German.

The Big Bang Theory Season 12, Episode 7
meaning German.

The Big Bang Theory Season 12, Episode 7
What's German for "annoying"?