I speak Polish as a native language. Though living abroad and having almost all friends in US, I don't use it much lately so I'm often catching myself on 'how the hell do I say this word in my own language' problem. It's funniest when I can't remember it in either English or Polish and I'm browsing my brain in panic trying to fill the empty space x)
Also I was learning French for a long long time (about 14 years), but I have never had the need to use is outside of classes. So now, after so many years devoted to learning a language I can say my name, and where I'm from using it... and that's about all. I can understand a little bit more but not much ^
I was also learning Finnish for couple of months when I was n exchange student, and a bit before because I find this language really wonderfully sounding. But also, haven't used it since then and I forgot most. But I still have all my notes and one day will probably refresh my memory ♥