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Occitan,is a Romance language spoken in Occitania. All of its subdivisions are generally mutually intelligible. The area where Occitan was historically dominant is home to some 14 million inhabitants. It may be spoken as a first language by as many as two million people in France, Italy, Spain and Monaco.

Oriya is one of the Indian languages mainly spoken in the Indian state of Orissa, though there are also significant Oriya-speaking populations in other linguistic regions, such as the Medinpur District of West Bengal and the Saraikela Kharsawan District of Jharkhand. Due to the increasing migration of labour, the west Indian state of Gujarat also has a significant Oriya speaking population with Surat being the second largest Oriya speaking city in India. The language is also an official language of India.

Oromo, also known as Afaan Oromoo, Oromiffa, and sometimes in other languages as variant spellings of these names is an Afro-Asiatic language, and the most widely spoken of the Cushitic sub-phylum