Bantu, the largest family of African languages: over 500 languages and about 400 million speakers. One family, one syllable equation, one noun-class agreement system — which is why one engineering approach, done properly once, reaches more than 500 languages.
Every Bantu language is built from the same small set of parts: a closed syllable inventory (σ → (N)(C)(H)(G)V, no syllable ends in a consonant), a noun-class system that governs agreement across the whole sentence, and tone carried on the syllable. Solve those three for one language with native speakers and a standard, and the same method transfers to the next 500. That is the leverage no other African language family offers at this scale.
BantuNomics covers the Bantu family only. We make no claim over Afroasiatic, Nilo-Saharan or Khoisan languages, and no claim of continent-wide coverage. Within the family, 459 languages have an operating alphabet defined; consented native audio exists for 14 today and grows with each recording cycle. The coverage page shows exactly which is which.
On L26, every frontier model scores 26 of 26 on the English alphabet and not one passes the blind Bantu bar. You can run the same test on your own model in one HTTP call at the Alphabet Test, and read per-language coverage at fsi.bantunomics.com/coverage.
A note on the word family: in the Niger-Congo classification Bantu is formally a branch, and by number of languages and speakers it is the largest grouping of African languages. We use "family" in that everyday sense, and we count it the way Ethnologue and Guthrie do.