Here's what we know:
* German: He was born in Germany and immigrated to the US as a teenager.
* English: His primary language, having lived in the US most of his life.
* French: He's been quoted as being fluent in French.
* Possibly Spanish: Some sources mention he has some Spanish fluency, though it's not confirmed.
It's important to note that the exact number and level of his language skills might not be public information.