Do you know the lyrics of any country's national anthem other than the US?
Canada and Argentina
UK. I have a funny story about the French national anthem. I was in the recovery room of a hospital. A patient started singing it at full volume. When she "woke up", she was told about it. She said she didn't know it; we said apparently you do!
I don't know all the lyrics, but I know some (and the gist of the translation) to the French national anthem.
The Syrian national anthem.