I think this is prominent enough to warrant its own trope.
Basically, the use of german within a series when it is not neccessarry. Note that for the Japanese, German is at least as "cool" as english.
- Bleach had a whole arc of german-centril villains spouting such stuff
- Xenosaga Alle Spezielle DVD
- One of the rare non-anime examples: The Quest for Glory series, particulary the first game.
- Fate/Stay Night