| English | eng-000 |
| j | |
| toskërishte | als-000 | j |
| Universal Networking Language | art-253 | j(icl>physics) |
| ISO 12620 | art-317 | levelJ |
| català | cat-000 | j |
| čeština | ces-000 | j |
| Central Minnesota Chippewa | ciw-001 | nin- |
| eesti | ekk-000 | j |
| English | eng-000 | J |
| English | eng-000 | competition |
| English | eng-000 | g |
| English | eng-000 | journal |
| English | eng-000 | tilt backwards |
| English | eng-000 | z |
| suomi | fin-000 | J |
| suomi | fin-000 | j |
| français | fra-000 | j |
| galego | glg-000 | j |
| हिन्दी | hin-000 | जे |
| hrvatski | hrv-000 | j |
| interlingua | ina-000 | littera j |
| bahasa Indonesia | ind-000 | J |
| íslenska | isl-000 | j |
| italiano | ita-000 | - |
| italiano | ita-000 | j |
| Loglan | jbo-001 | jei |
| 日本語 | jpn-000 | ジュール |
| 한국어 | kor-000 | 제이의 이형 |
| 한국어 | kor-000 | 제이자형 |
| 한국어 | kor-000 | 제이자형의 것 |
| português | por-000 | J |
| Romanova | rmv-000 | je |
| lingua siciliana | scn-000 | J - - - - - - - - |
| slovenčina | slk-000 | j |
| slovenščina | slv-000 | J |
| slovenščina | slv-000 | j |
| chiShona | sna-000 | -dedudza |
| chiShona | sna-000 | makundano |
| español | spa-000 | J |
| español | spa-000 | j |
| español | spa-000 | jota |
| ภาษาไทย | tha-000 | ตัวเจ |
| ภาษาไทย | tha-000 | พยัญชนะอังกฤษตัวที่10 |
| ภาษาไทย | tha-000 | เจ |
| Talossan | tzl-000 | txota |
| tiếng Việt | vie-000 | j |
| Bahasa Malaysia | zsm-000 | J |