Actually I'm teaching right now, my pupils are working on their assignments. Every now and then I walk back to my computer and check TBT occasionally.
I know most pupils think we only work and sleep, but this is definitely not the case, not even for my older (50+) colleagues.
I also speak a little German (I manage), French (ditto), Chinese (spent half a year there for a minor in college, I can still speak it, but the Chinese speak too fast for me to understand them. XD
Travelling is awesome, you should get out of the US sometime soon (no idea how old you are though), the world's an amazing place.
Btw - I will remember all the grammar rules forever, just like the words. I'm afraid of forgetting set prepositions - I often end up having to google them. -_-