The concept of the “rarest” language can be a bit complex and subjective. It depends on how one defines rarity. A language can be considered rare due to factors like the number of speakers, the geographic isolation of its speakers, or the risk of extinction. Here are a few examples of languages that are often considered rare or endangered:

Taa (ǃXóõ): Taa, also known as ǃXóõ, is a language spoken by the ǃKung people in Southern Africa. It is known for its complex system of click consonants and has a relatively small number of speakers, making it one of the rarest languages in the world.

N|uu: N|uu is another click language spoken in Southern Africa. It has a very small number of speakers, and there are ongoing efforts to revitalize and preserve the language.

Jeru: Jeru, also known as Zerenkel, is an endangered language spoken in the mountains of the Caucasus region. It is at risk of disappearing due to the small number of speakers and limited intergenerational transmission.

Ayapaneco: Ayapaneco is a nearly extinct language spoken in Mexico. At one point, only two elderly individuals were known to speak it, and it was in danger of dying out. Efforts have been made to revive the language.

Lemerig: Lemerig is an endangered language spoken on the island of Vanuatu in the South Pacific. It has very few speakers left, and there is concern about its survival.

Chulym: Chulym is a critically endangered Turkic language spoken in Siberia, Russia. It has very few speakers, and the language is at risk of disappearing.

It’s important to note that the rarity of a language is often tied to the risk of extinction. Many languages around the world are endangered due to factors such as language shift, cultural assimilation, and the dominance of more widely spoken languages. Efforts to document, revitalize, and preserve endangered languages are ongoing in many parts of the world to prevent the loss of linguistic and cultural diversity.