Place it at the start of a language mix-up edit, right after the English question lands, then follow it with Nope for a firm refusal or Okay Let's Go when you decide to try anyway. Keep it as the reaction beat before the scene moves on.
關於此聲音
This is a short voice clip lasting about four and a half seconds, in which a speaker says the mixed German and English line 'I'm not verstehen Englisch'. It feels funny and awkward at once, like an honest admission of not understanding, and it works as a quick, self-deprecating reply when language gets in the way.