| Subject | English | Russian |
| ling. | be fluent in a foreign language | свободно владеть иностранным языком (Alex_Odeychuk) |
| gen. | be fluent in ... language | свободно владеть каким-л. языком (The Musqueam Nation doesn't have a single person that is fluent in their own language. Why is this being forced on non-Musqueam residents if they haven't bothered to learn their own language? (vancouversun.com) ART Vancouver) |
| gen. | be fluent in ... language | свободно говорить на каком-л. языке (The Musqueam Nation doesn't have a single person that is fluent in their own language. Why is this being forced on non-Musqueam residents if they haven't bothered to learn their own language? (vancouversun.com) ART Vancouver) |
| busin. | be fluent in three languages | свободно говорить на трёх языках |
| ling. | be not fluent in the language | быть не в состоянии свободно понимать и говорить на определённом языке (Alex_Odeychuk) |