I took a year of Russian in high school, speak a smattering of Spanish and read a bit more, and can communicate effectively in ASL, which is classified as a foreign language by most colleges in that they will accept it to fulfill the foreign language requirement.
Funny story: My husband took ASL as his foreign language in college, as did his fiancee at the time. One day, they were having lunch together in the Student Union and he made her an indecent proposition in sign language. He noticed that the man at a nearby table looked very startled and left quickly. He found out later that week that the man was the new ASL adjunct professor.
LOL! I like listening in on conversations between foreigners on public transportation who assume Americans only understand English. One time two Italian guys were rating my looks and when I got up to get off at my stop I turned to them and said yes, I am naturally blond. They had said some pretty vulgar things so it was fun to see their mouth drop open.
When I was living in France, I was checking out at a grocery store - buying some produce - and two English guys were in line behind me. They were getting pretty vulgar, too - wondering out loud what I planned on doing with my produce on that Friday evening. I didn't say a word. But when one of them said to the other that he better be careful with what he says because a lot of French understand English, I couldn't resist walking through
that door. I turned to them and said, "A lot of Americans understand English pretty well, too."
The most vulgar one turned pink, then red, then a very unusual shade of lavender. The other limey was doubled over with laughter. Juuuuuuust a bit embarrassed. It was fun doing that.