Hungarians make up the largest part of the population but there are also several other ethnic communities. The largest of these are the Roma and Germans. Hungarian is the most widely used language in Hungary. Ethnic communities often use their own languages as well. The majority of Hungarians are religious, mainly Roman Catholic and Calvinist (in Hungarian 'református' - 'reformed'). There are Jews, often in intellectual and artistic occupations, and some Muslims. Orthodox Christianity is practised by ethnic minorities from eastern Europe.