What is the comparative form of fluently?

There isn't a direct comparative form of "fluently" because it's already an adverb describing the degree to which someone speaks a language.

To express a higher degree of fluency, you can use adverbs like:

* More fluently

* More effortlessly

* With greater fluency

* With more ease

For example:

* "He speaks English fluently."

* "She speaks Spanish more fluently than she does English."

* "He communicates with greater fluency after studying abroad."