The Indo-European language family is widely spoken in the Indian Ocean Region, including languages like Hindi, Urdu, Bengali, and Persian.

Dhivehi is the official language of the Maldives, spoken by the majority of the population.

Sinhala is the official language of Sri Lanka and is spoken by the majority of the population.

Creole, a French-based language, is spoken by the majority of the population in Mauritius.

Creole, a French-based language, is spoken by the majority of the population in the Seychelles.

Comorian, a Bantu language, is spoken by the majority of the population in the Comoros.

Malagasy, an Austronesian language, is spoken by the majority of the population in Madagascar.

Dhivehi, an Indo-Aryan language, is spoken by the majority of the population in the Maldives.

Nicobarese, an Austroasiatic language, is spoken by the majority of the population in the Andaman and Nicobar Islands.

Lakshadweep Creole, a Malayalam-based language, is spoken by the majority of the population in the Lakshadweep Islands.

Creole, a French-based language, is spoken by the majority of the population in the Chagos Archipelago.

Malay, an Austronesian language, is spoken by the majority of the population in the Cocos (Keeling) Islands.

English is the official language and is spoken by the majority of the population in the Christmas Island.

The Heard Island and McDonald Islands are uninhabited, so there is no majority language spoken.

The British Indian Ocean Territory is uninhabited, so there is no majority language spoken.