彼はフランス語が流暢だ。

彼はふらんす語が流暢だ。

He is fluent in French.

彼(かれ)はフランス語(ご)が流暢(りゅうちょう)だ。

Kare wa furansugo ga ryūchō da.

彼 (かれ)

he; him; his; boyfriend

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

フランス語 (フランスご)

French (language)

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

流暢 (りゅうちょう)

fluent (language skill); flowing

だ (だ)

be; is; indicates past or completed action; indicates light imperative

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ゴ、かた.る、かた.らう

Meanings: word, speech, language

Readings: リュウ、ル、なが.れる、なが.れ、なが.す、 -なが.す

Meanings: current, a sink, flow, forfeit

Readings: チョウ、のび.る

Meaning: stretch