It was fun to see that Dallin hadn't forgotten all of his German and that he was still more comfortable communicating with his little siblings in German than in English. On several occasions, I caught Dallin and the boys playing Legos together, and of course, I was thrilled to hear them conversing in German. Even though they don't always speak German, I'm so glad that they still "can" and often "do" speak German.
I also found that there was another perk to having Dallin spend two years in another country, learning a third language: He came home even more interested in improving his German. And I actually think that learning Portuguese (along with all the Portuguese grammar), helped him to better understand German grammar. Granted, he has forgotten quite a bit of his vocabulary, but I watched it come back very quickly as he spent time talking and playing with his little siblings. It will be fun to see how all of this pans out! I'm just always happy when I see that German is still a special language that the kids use when they are bonding.