[mark38848]

I suppose like the general American of today, he has just never really learnt an n-th language (where n>1).

[jkaplowitz]

He actually learned German well enough to have appreciative audiences in Germany, but he also knows how to make amazing comedic essays on many topics. He did plenty about US-specific topics, and about French too, not just about German.

[GuestFAUniverse]

Which gives us Hitler memes where they audibly says German words that are very similar to their English counterparts, but the /funny/ subtitles is just a Beavis and Butthead level joke.

Doesn't work as good if one has ears.