I am so glad I found this thread! I have an ear for languages and in addition to English, I have passable Spanish and nearly fluent French (one of my current goals is to upgrade the French to full-on bilingual, partly for career benefits and partly because I think it is a worthy goal). I also was in a Hebrew day school as a kid. We did half the day in Hebrew. I came out of Grade 6 pretty much fluent but did not use it much since then. I am now teaching at the same sort of school I went to and lots of the teachers are Israeli, so it is all coming back. But, I never did regain my former ability to read without vowels. I need the nikud
But I can read, write (although not as well as I can speak) and carry on decent conversation in French and Hebrew. And, I have a smattering of New Zealand Maori. It could have been more, but we had a lousy teacher and they weren't quite sure what their goal was with the course (i.e. did they want people who could speak it, or people who were culturally sensitive about it) so I did not get as far as I could have. Given my past experience with languages, I could have advanced far more than I did. I can count to ten, sing a few songs, and identify the river, mountain and ancestral canoe of the region where I stayed.