| français | fra-000 |
| double couche | |
| Deutsch | deu-000 | Doppeltheit |
| Deutsch | deu-000 | Zweifachheit |
| English | eng-000 | double |
| English | eng-000 | double layer |
| English | eng-000 | double-layer |
| English | eng-000 | duplex |
| English | eng-000 | two layers |
| English | eng-000 | two-fold |
| français | fra-000 | double |
| 日本語 | jpn-000 | 二重 |