Three Different Languages
Amish folk will grow up learning three different languages: English, German, and Pennsylvania Dutch. Area schools and businesses will use English out of politeness (since that's what a majority of their non-Amish neighbors speak) but almost all Amish religious services are in German. Conversation between Amish people is usually Pennsylvania Dutch, a language that's derived from German.
Teens Return for Baptism and Marriage
After teenagers finish up their Rumspringa spree, they usually return for their new baptism. Soon after the baptism comes marriage, but they are not arranged. The teenagers/young adults meet people in public settings and go on private dates before they decide to get married.