A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
I
| Language name | Native name | Code |
|---|---|---|
| Iban | - | IBA |
| Icelandic | Íslenska | ICE |
| Ido | Ido | IDO |
| Igbo | Igbo | IBO |
| Ijo languages | - | IJO |
| Iloko | - | ILO |
| Inari Sami | Säämegiella | SMN |
| Indic languages | - | INC |
| Indo-European languages | - | INE |
| Indonesian | Bahasa Indonesia | IND |
| Ingush | Гӏалгӏай Мотт | INH |
| Interlingua | Interlingua | INA |
| Interlingue; Occidental | Interlingue | ILE |
| Inuktitut | ᐃᓄᒃᑎᑐᑦ | IKU |
| Inupiaq | Iñupiaq, Iñupiatun | IPK |
| Iranian languages | - | IRA |
| Irish | Gaeilge | GLE |
| Irish, Middle | Gaoidhealg | MGA |
| Irish, Old | Goídelc | SGA |
| Iroquoian languages | - | IRO |
| Italian | Italiano | ITA |