| ISO 639-3 Print Names | art-290 |
| Occidental | |
| ISO 639-3 | art-001 | ile |
| ISO 639-2/T | art-002 | ile |
| ISO 639-2/B | art-003 | ile |
| ISO 639-1 | art-004 | ie |
| ISO 639-3 Reference Names | art-289 | Interlingue |
| ISO 639-3 Print Names | art-290 | Interlingue |
| ISO 639-3 Inverted Names | art-291 | Interlingue |
| ISO 639-3 Inverted Names | art-291 | Occidental |