....or maybe some languages you found really difficult to learn?

Japanese, French, and German

I'm interested in learning German. I took French in high school for 2 years and learned nothing because it was one of those teachers who didn't actually teach so that was the hardest for me to learn. Went to France helpless lmao.

Honorable mention to American sign language and maybe Morse code.  They're not technically 'foreign' languages, but I don't know them and I'm particularly interested in American sign.  Braille would be interesting too.

French is the major one.  I almost made it into an honor's class for French in community college, but I never became fluent enough to really move forward.  Their culture seems interesting to me as well and I wouldn't mind going to France someday between their many political protest days and the hours of one of their bakeries.  German would be useful as well since I'm heading for Switzerland when the going gets tough, and maybe Gaelic to appease some of my "Heinz 57, bastard of multiple cultures, non-Mayflower riding, Scotch-Irish with a little Native American sprinkled in because I live near the mountains" heritage.

I really need to learn Japanese. But I'm also interested in learning Korean and French.

French is my maternal language.
English is my secondary language.
I learned some Spanish when younger but lost it since then.

I want to learn some basic Japanese to be honest.

I would LIKE to learn Japanese but I am far too lazy to learn their sentence structure. I have an early stage knowledge of French so I may aswell finish that.

Spanish would be the most useful.