Ah right.

I was just using a single sound as an example because I was feeling too lazy to get a collection of phonetic characters, a fault on my part.

Seeing as a lot of sounds use the same muscle groups, it stands to reason that multiple sounds will be affected from signal damage to the brain or nervous system rather than just one. It still wouldn't create a genuine German accent though, only hints of one. (I'm using German as an example purely because I recently watched a video on how to talk like Einstein)

I agree that a single sound change wouldn't sound foreign, but would sound unique, i.e., Sean Connery's accent.