He is a fluent speaker of Hebrew.

他希伯来语说得很流利。

《柯林斯英汉双解大词典》

He is a fluent speaker of English.

他英语讲得很流利。

youdao

If you could get rid of that idea. You'd be a more fluent speaker.

如果你能摆脱那种想法，你旧能说得更流利了。

youdao

He is a fluent speaker of Italian - as well as German and Spanish - so will have no problems communicating with the team around him.

BBC: Humble Francis brings both change and continuity

O'Brian was a fluent speaker of French and Catalan.

BBC: Patrick O'Brian: Master of the seafaring saga

Pansieri, a fluent speaker of English, German, French, Spanish and Chinese, in addition to her native Italian, holds doctorate degrees in philosophy from Milan University and in Chinese language and literature from Venice University.

UN: Secretary-General