The Sangmian-Casmadak languages form a small and contested language family of Boroso, comprising the Sangmian languages of Sangmia and the Casmadakan language of Yaxarhayut. The Sangmian branch is solid, comprising at least five extant varieties in Sangmia and several historical forms in Sangmia and the surrounding regions (southwest Tuanmali and mountainous !Khaaz). The proposed link to the Casmadakan language enjoys some following but is not universally agreed-upon. The family totals perhaps eight million speakers, with over six million speakers of the Sangmian languages and 1.4 million speakers of Casmadakan.
Languages
| Language |
Classification |
Number of native speakers |
Location
|
| Tunnau language |
Sangmian |
2,800,000 |
Mwamba
|
| Casmadakan language |
Casmadak |
1,400,000 |
Yaxarhayut
|
| Kräk language |
Sangmian |
1,300,000 |
Mwamba
|
| Haanzac language |
Sangmian |
1,100,000 |
Mwamba
|
| Veizea language |
Sangmian |
800,000 |
Mwamba
|
| Ubëishounhai language |
Sangmian |
700,000 |
Mwamba
|