Request to add locale Malawian Tumbuka

I would like to apply for the inclusion of the new language below:

Locale: tum_MW
Country code: MW
Plural forms: nplurals=2; plural=(n != 1)
Language native name: Tumbuka
Language English name: Malawian Tumbuka
Site Title: Nkhani Mchitumbuka
Site Description: WordPress in Nkhani Mchitumbuka
Admin Usernames: Asambizi, Medie, Mannass and Cosmas