About the adding 'er'...I didn't know that! That's kind of awesome. You don't have to struggle to remember two completely different languages. XD
I wish my great grandfather hadn't been afraid to teach his family German when he moved here during the Nazi war. Can't blame him, but I would be bilingual now. *pout* I think German is very gutteral and rough, and that makes it cool sounding, but it can sound a tad mean at times. XDDD
My favorite languages are Japanese, Thai and Russian. There are many I haven't heard, I know that for sure, but of the ones I hear the most those are my favorites. :3