The Maringarr language (Marri Ngarr, Marenggar, Maringa) is a moribund Australian Aboriginal language spoken along the northwest coast of the Northern Territory.

Marti Ke (Magati Ke, Matige, Magadige, Mati Ke, also Magati-ge, Magati Gair) lies in the same language category. It is or was spoken by the Mati Ke people. As of 2020^[update] it is included in a language revival project which aims to preserve critically endangered languages.

The language has been spoken in the Northern Territory, Wadeye, along Timor Sea,^[3] coast south from Moyle River estuary to Port Keats, southwest of Darwin.^[4]

According to the Language Database, as of 2005 Mati Ke language had a population of three (Patrick Nudjulu, Johnny Chula, Agatha Perdjert).^[3][5] Mati Ke speakers have primarily switched to use of English and the flourishing Aboriginal language Murrinh-Patha.^[3] The ethnic population is about 100, and there are 50 second language users.

As the language is almost non-existent to date, linguists have been working on collecting information and recording the voices of the remaining speakers.^[3]

The vocabulary is limited, therefore the relations and positioning of the words matter to make sense of the construction according to the situation. It is a polysynthetic language.^[8]

Marringarr also contains ergativity, which is marked by the postposition -ŋarrin.^[9]

Nouns' classification constitutes a core of the language that forms an understanding of the world for its speakers. There are 10 noun classes including: trees, wooden items and long rigid objects; manufactured and natural objects; vegetables; weapons and lightning; places and times; animals; higher beings such as spirits and people, and speech and languages.^[3]