Off topic -but in one church I visited in the midwest (I think it was Iowa, but I wouldn't swear to it) there was actually a Dutch flag!
I asked my FIL (he is Dutch from NW Iowa) and his first words were "Netherlands Reformed?" They have their sermons in Dutch and are "very Calvinist" in his words.
Hmmm... Well, the sermon was most definitely in English! It was a church that had some sort of Dutch connection (obviously). I want to say CRC, but that's not it. I think it was more conservative than the CRC. I was visiting a friend at Dordt College and went to church with her.
Hmmm! URC maybe? Or PRC? I don't know if NR churches still do everything in Dutch or not (anyone?)