| Interlingue | ile-000 |
| expert | |
| English | eng-000 | expert |
| English | eng-000 | learned |
| English | eng-000 | masterly |
| English | eng-000 | practised |
| English | eng-000 | proficient |
| English | eng-000 | skilful |
| Interlingue | ile-000 | competent |
| Interlingue | ile-000 | dexteri |
| Interlingue | ile-000 | doct |
| Interlingue | ile-000 | erudit |
| Interlingue | ile-000 | exercit |
| Interlingue | ile-000 | habil |
| Interlingue | ile-000 | qualificat |
| Interlingue | ile-000 | superiori |
| Interlingue | ile-000 | versat |
| Interlingue | ile-000 | versat in |