These two are probably a bit overused on you know you're obsessed with (whatever) lists, but I'll say:
-You make a list like this
-You add items to it
Others:
-You do as many languages as possible at school
(at my school, for people who do HSC, English is compulsory, and the following languages are offered: German, French continuers, Japanese for beginners, Latin, Indonesian (preliminary), and Indonesian HSC. As far as I know, Latin runs parallel to Indonesian HSC, and obviously you would be either doing preliminary or HSC Indonesian and not both, but other than that, I wonder if anyone tries to do all of them. Sorry if this is a bit off topic. (no, I don't actually do this)
-You're shocked/disappointed to find out that the item above doesn't apply to me (as in: how could you not do lots of languages at school when you have the chance?!)
-You study the languages of your choice outside of school despite the fact that you already have as many subjects as you're supposed to have at school. (actually, this one applies to me)