Nostalgia

We are 3 days into our trip to Germany. Surprisingly, BK1 still speaks to BK2 in Arabic/French. BK1 can be totally immersed in a German conversation, she would nevertheless switch to Arabic/French to speak to BK2 (as she would obviously to me). I wonder what mechanism prompts this choice. Whatever the reason, I can't help feeling a little proud, and comforted that a bit of my culture is shared by my two girls. I suppose this feeling is accentuated by the Christmas period. I never celebrated Christmas, of course, before being part of my husband's family. I embrace this tradition, in the same way hubby embraces mine (ramadan, eid etc). However, I still sometimes feel alien to the Occidental ways. I miss my parents, my family, my culture, my country...