The Maasai, Masai or Maa language is a member of the East Niolitic branch of the Nilo-Saharan language family spoken by about 900,000 people in southern Kenya and northern Tanzania. The term Maasai refers to 'one who speaks the Maa language'.
Maasai is taught in schools to some extent, though the languages of instruction are Swahili and English. There is a Maasai dictionary, a Maasai translation of the Bible, and a few other publications, but generally the language is not used in writing very much.
source
wikipedia.org,
omniglot.com &
ethnologue.com