| 日本語 | jpn-000 |
| 内密の | |
| English | eng-000 | clandestine |
| English | eng-000 | covert |
| English | eng-000 | secret |
| English | eng-000 | undercover |
| English | eng-000 | underhanded |
| Esperanto | epo-000 | konfidenca |
| italiano | ita-000 | furtivo |
| 日本語 | jpn-000 | 内緒の |
| にほんご | jpn-002 | ないみつの |
| español | spa-000 | furtivo |