| dansk | dan-000 |
| underjordisk jernbane | |
| Deutsch | deu-000 | Tiefbahn |
| Deutsch | deu-000 | U-bahn |
| Deutsch | deu-000 | Untergrundbahn |
| English | eng-000 | tube railway |
| English | eng-000 | underground railway |
| British English | eng-005 | tube railway |
| British English | eng-005 | underground railway |
| français | fra-000 | chemin de fer souterrain |