- Danish
- Professor Humbugh
- Dutch
- Professor Dublix
- Finnish
- Dupleks, Professori Mikronen
- French
- Professeur Doublix, Professeur Doublixe
- German
- Professor Doublex
- Italian
- Professor Kappa
- Norwegian (bokmål)
- Dobleks
- Polish
- Dubel, Profesor Utan
- Simplified Chinese
- 杜波莱, 二X, 达莱克斯, 都柏利克斯
- Spanish
- Profesor Kappa
- Swedish
- Dublex