One thing people feel they have free rein to constantly comment on, is what language I speak in my home and to my partner. The most common refrain is, 'You are in Germany, you should speak German to each other' and other variations on the theme. Frankly, I tend to feel telling me what language to speak to my partner is like me telling you how often you should be having sex with yours.
I love this post! It's funny... Even though Brian doesn't fluently speak another language, we say little things to each other in both Spanish and Polish. I love it - and the fact that I now know a few words of Polish. It is a part of our relationship despite the fact that we aren't both bilingual.