He was fluent in German.I am not so fluent in Japanese.
The superlative form of fluent is "most fluent."
No, the word fluent is not an adverb.The word fluent is an adjective.
a
fluent thinking
fluent
Yes it can.Ex. "She speaks in fluent sentences." "His sentences are fluent."Fluent Adj.1.a. Able to express oneself accurately and effortlessly: a fluent speaker; fluent in two languages.b. Effortlessly flowing and smooth; polished: spoke fluent Italian; gave a fluent performance.2. Flowing or moving smoothly; graceful: a dance with long, fluent curves.3. Graceful in motion or shape: the fluent body of a dancer.(From Latin; fluens flowing)
fluent talker
"Fluent" can be an adjective when describing someone's ability to speak a language effortlessly and accurately, for example, "He is fluent in Spanish."
The translator was fluent in several languages.
You can use "fluent" in a sentence like this: She is fluent in Spanish, French, and Italian, making her a valuable asset to the team.
"The American man was fluent in french"