| Value | Category |
|---|---|
| -99 | Refusal |
| -88 | Not provided |
| -77 | Not applicable |
| -66 | Dont know |
| 1 | Tagalog (Filipino) |
| 2 | Kapampangan |
| 3 | Pangasinense |
| 4 | Iloko |
| 5 | Bikol |
| 6 | Visayan / Cebuano / Sinugbuanong Binisaya |
| 7 | Hiligaynon |
| 8 | Waray |
| 9 | Tausug |
| 10 | Maguindanaoan |
| 11 | Maranao |
| 12 | Chabacano |
| 13 | English |
| 97 | Other |