| 639 | 639-2/T | 639-2/B | Language name (in English) | Date added or changed |
| ae | ave | ave | Avestan | 2000-02-18 |
| bs | bos | bos | Bosnian | 2000-02-18 |
| ch | cha | cha | Chamorro | 2000-02-18 |
| ce | che | che | Chechen | 2000-02-18 |
| cu | chu | chu | Church Slavic | 2000-02-18 |
| cv | chv | chv | Chuvash | 2000-02-18 |
| hz | her | her | Herero | 2000-02-18 |
| ho | hmo | hmo | Hiri Motu | 2000-02-18 |
| ki | kik | kik | Kikuyu | 2000-02-18 |
| kj | kua | kua | Kuanyama | 2000-02-18 |
| kv | kom | kom | Komi | 2000-02-18 |
| mh | mah | mah | Marshall | 2000-02-18 |
| mnc | mnc | Manchu | 2000-02-18 | |
| nv | nav | nav | Navajo | 2000-02-18 |
| nr | nbl | nbl | Ndebele, South | 2000-02-18 |
| nd | nde | nde | Ndebele, North | 2000-02-18 |
| ng | ndo | ndo | Ndonga | 2000-02-18 |
| nn | nno | nno | Norwegian Nynorsk | 2000-02-18 |
| nb | nob | nob | Norwegian Bokmål | 2000-02-18 |
| ny | nya | nya | Chichewa; Nyanja | 2000-02-18 |
| oc | oci | oci | Occitan (post 1500); Provençal | 2000-02-18 |
| os | oss | oss | Ossetian; Ossetic | 2000-02-18 |
| pi | pli | pli | Pali | 2000-02-18 |
| sgn | sgn | Sign languages | 2000-02-18 | |
| -sh | Serbo-Croatian [withdrawn; use "bs", "hr", or "sr"] | 2000-02-18 | ||
| se | sme | sme | Northern Sami | 2000-02-18 |
| smi | smi | Sami languages Other | 2000-02-18 | |
| sc | srd | srd | Sardinian | 2000-02-18 |
| kw | cor | cor | Cornish | 1998-09-09 |
| gv | glv | glv | Manx Gaelic | 1998-09-09 |
| lb | ltz | ltz | Letzeburgesch [Luxembourgish] | 1998-09-09 |
| se | Northern Sami | 1989 | ||
| he | heb | heb | Hebrew | 1989 |
| -iw | heb | heb | Hebrew [withdrawn; use "he"] | 1989 |
| id | ind | ind | Indonesian | 1989 |
| -in | ind | ind | Indonesian [withdrawn; use "id"] | 1989 |
| iu | iku | iku | Inuktitut | 1989 |
| ug | uig | uig | Uighur | 1989 |
| -ji | yid | yid | Yiddish [withdrawn; use "yi"] | 1989 |
| yi | yid | yid | Yiddish | 1989 |
| za | zha | zha | Zhuang | 1989 |