Our daughter has lived in Spain and Argentina, so she is fairly fluent in Spanish.
Ernests' English was fairly fluent, but I wondered if he could possibly have gotten the word wrong.
Zoya spoke fairly fluent German.
He was fairly fluent in a weepy sort of French from having listened to Edith Piaf for so long.
They had various levels of experience, from rank beginner to fairly fluent.
During his stay in Puerto Rico, Thompson acquired a fairly fluent, although informal and at times incorrect, use of Spanish, which he has continued throughout his career.
You'll make life a lot easier if you're fairly fluent in Russian.
His ignorance of Latin led him to expel the language from the Academy; it was replaced with German, in which he was fairly fluent.
Bryusov, by now, was fairly fluent in the local lingua franca.