| English | eng-000 |
| hard problem | |
| 國語 | cmn-001 | 令人頭痛 |
| 國語 | cmn-001 | 謎 |
| 國語 | cmn-001 | 難題 |
| Deutsch | deu-000 | Schwierigkeit |
| Deutsch | deu-000 | schwierige Angelegenheit |
| Deutsch | deu-000 | schwieriger Kunde |
| Deutsch | deu-000 | schwieriger Mensch |
| English | eng-000 | hard nut to crack |
| English | eng-000 | person hard to please |
| English | eng-000 | puzzle |
| English | eng-000 | riddle |
| hrvatski | hrv-000 | teški problem |
| 日本語 | jpn-000 | 難物 |
| Tâi-gí | nan-003 | bĕ |
| Tâi-gí | nan-003 | bī |
| Tâi-gí | nan-003 | lăn-tĕ |
| русский | rus-000 | трудный проблема |