It's important to remember that "fluent" is already a superlative adjective, meaning it describes the highest degree of fluency. So, "most fluent" emphasizes that someone is the most fluent among a group or in a particular context.
It's important to remember that "fluent" is already a superlative adjective, meaning it describes the highest degree of fluency. So, "most fluent" emphasizes that someone is the most fluent among a group or in a particular context.