Well, English is my native language.
I've spent the most time on Spanish, but I'm WAY better at reading it than engaging in conversation (which I suppose is not surprising).
On and off, I'll get back to working on German as my dad, his partner, and my new baby brother live in Hamburg. I'm just not as consistent as I need to be.
For various trips and other reasons over the years, I've learned bits of Japanese, Arabic, and Mandarin--I was probably best at Japanese but that was back when I was about thirteen and I let it all slip away.
Someday, I'll do it all the way it should be done.