| Value | Category | Cases | |
|---|---|---|---|
| -2 | Don't know | 38 |
1.3%
|
| -1 | Refused | 3 |
0.1%
|
| 1 | Vernacular language | 2311 |
77.1%
|
| 2 | Swahili | 647 |
21.6%
|
| 3 | Foreign language | 0 |
0%
|