My guess is that it’s more than the number of languages you speak, read, and/or write.

Do you feel cheated because I didn’t pick a number? Vote how you want to, or don’t vote! I’m just interested in the count.

I can count to ten in five languages, but I only speak two. I can read a third, and I once was able to converse in a fourth, but have long since lost that skill. I know only some pick-up/borrow words from the 5th, including counting to 10.

1. My native language is English
2. I lived in Germany for a couple of years; because I never took classes, I can’t write in German, but I spoke fluently by the time I left.
3. I studied French in college for three years; I can read French, but I’ve yet to meet a French person who can understand what I’m trying to say, and I have a hard time comprehending it.
4. I taught myself Esperanto a couple of decades ago, and used to hang out in Esperanto chat rooms. I haven’t kept up.
5. I can count to ten in Japanese because I took Aikido classes for a decade or so, and my instructor counted out loud in Japanese, and the various movements are numbered.

I can almost count to ten in Spanish, because I grew up in mid-California and there was a lot of Spanish thrown around. But French interferes, and I start in Spanish and find myself switching to French in the middle, so I’m not sure I could really do it.