| Company name | Reg. code |
|---|---|
| KAROLINGUA OÜ | 11418487 |
| KAROLING OÜ | 12189416 |
| KAROLINA BERTRAM OÜ | 17476860 |
| KAROLINA KAUBANDUS OÜ | 16006683 |
| KAROLINA SALONG OÜ | 11130823 |
| EUROLINGUA OÜ | 14148858 |
| PROLINGUA OÜ | 16103920 |
| PROLINGUA TRANSLATIONS OÜ (former name Proweb Solutions OÜ) | 12859271 |
| STAFF POWER GROUP OÜ (former name Karolina Iluteenused OÜ) | 12939254 |