| Abbreviation | Definition |
|---|---|
| IKU | Inuktitut |
| ILO | Iloko |
| INA | Interlingua (International Auxiliary language Association) |
| INC | Indic (Other) |
| IND | Indian Ocean |
| IND | Indonesian |
| INE | Indo- European (Other) |
| INE | Interlingue |
| IPK | Inupiak |
| IRA | Iranian (Other) |
| IRI | Irish |
| IRO | Iroquoian languages |
| ISL | Icelandic |
| IST | Istanbul |
| ITA | Italian |
| JAV | Javanese |
| JAW | Javanese |
| JEI | YEI language |
| JPN | Japanese |
| JPR | Judeo- Persian |