| U+ | art-254 |
| 2017 | |
| Unicode Character Names | art-315 | DOUBLE LOW LINE |
| Unicode Character Names | art-315 | SPACING DOUBLE UNDERSCORE |
| American English | eng-004 | DOUBLE UNDERSCORE |
| français | fra-000 | DOUBLE SOULIGNÉ QUI CHASSE |
| français | fra-000 | DOUBLE TRAIT SOUSCRIT |
| français | fra-000 | DOUBLE TRAIT SOUSCRIT QUI CHASSE |