| ISO 639-3 | art-001 |
| nhp | |
| ISO 639-3 Reference Names | art-289 | Isthmus-Pajapan Nahuatl |
| ISO 639-3 Print Names | art-290 | Isthmus-Pajapan Nahuatl |
| ISO 639-3 Inverted Names | art-291 | Nahuatl, Isthmus-Pajapan |
| Ethnologue Primary Language Names | art-323 | Nahuatl, Isthmus-Pajapan |
| Glottolog Languoid Names | art-326 | Isthmus-Pajapan Nahuatl |
| Glottocode | art-327 | isth1241 |
| Glottolog Primary Key | art-328 | 34625 |
| Ethnologue Language Names | art-330 | Nahuatl, Isthmus-Pajapan |
| Ethnologue Language Names | art-330 | Náhuat de Pajapan |
| English | eng-000 | Isthmus-Pajapan Nahuatl |