I just found a little factoid -

The last president who could speak a language fluently outside of English was Franklin D. Roosevelt. He also spoke French and German.

It's interesting we had to go back so far.

The last president who could speak and Read in English?

Joe Biden.

Okay, I'll give the current occupying orange whatever it is a pass on speaking it at a 4th grade level, but I'm not certain he knows how to read. He doesn't seem to like to do it.