Most of the inhabitants of the island are culturally Comorians. The Comorians are a blend of settlers from many areas: Iranian traders, mainland Africans, Arabs and Malagasy. Comorian communities can also be found in other parts of the Comoros chain as well as in Madagascar. In 2017, mothers born in foreign countries (predominantly the Union of the Comoros) were responsible for 75.7% of the births that took place in Mayotte although many of these births were to French fathers: 58% of children born in Mayotte in 2017 had at least one French parent. The main religion in Mayotte is Islam, with 97% of the population Muslim and 3% Christian. The main religious minority, Roman Catholicism, has no proper diocese but is served, together with the Comoros, by a missionary jurisdiction, the Apostolic Vicariate of Comoros Archipelago. French is the only official language of Mayotte. It is the language used for administration and the school system. It is the language most used on television and radio as well as in commercial announcements and billboards. In spite of this, knowledge of French in Mayotte is lower than in any other part of France. The native languages of Mayotte are:  Kibushi is spoken in the south and north-west of Mayotte, while Shimaore is spoken elsewhere. Besides French, other non-indigenous languages are also present in Mayotte:  Shingazidja and Shimwali on the one hand and Shimaore on the other hand are generally not mutually intelligible. Shindzwani and Shimaore are perfectly mutually intelligible. No questions regarding the knowledge and/or use of languages were asked in the 2012 and 2017 censuses, and no question relative to languages will be asked in the future censuses of Mayotte, leaving the now quite outdated census data from 2007 as the last official data on the topic of languages. Improvement in schooling has markedly increased French literacy and knowledge since 2007. At the 2007 census, 63.2% of people 14 years and older reported that they could speak French, with large differences with age. 87.1% of those whose age was 14 to 19 years old reported that they could speak it, whereas only 19.6% of those aged 65 and older reported that they could speak it. 93.8% of the population whose age was 14 or older reported that they could speak one of the local languages of Mayotte (Shimaore, Kibushi, Kiantalaotsi, or any of the Comorian dialects, which the census included in the 'local languages'). 6.2% of the population aged 14 and older reported that they spoke none of the local languages and could speak only French.