彼女は日本語がペラペラだの英語

She spoke Japanese well.

He's fluent in Japanese.

She can speak Japanese quite well.

She can speak Japanese.

She can hardly speak Japanese.

She has come to speak a little Japanese.

She is good at speaking Japanese.

Apparently, she only speaks Japanese.

She can speak a little Japanese.

My Japanese is fluent.

He can speak Japanese.

She speaks Japanese so well that she could pass as [for] a Japanese.

She doesn't speak Japanese at home.

She speaks Japanese.

She doesn't speak Japanese at home.

He speaks Japanese very well.

He has a good command of Japanese.

She shines at [in] foreign languages.

She speaks Japanese to some extent.

He can speak Japanese very well.

He speaks Japanese well.

She's well schooled in languages.

He speaks Japanese quite fluently.

She speaks Portuguese.

Every time I meet her she gets better at Japanese.

She can speak Chinese as well as English.

He can speak Japanese.

He can speak Japanese now.

He is able to speak Japanese.

What a good speaker of Japanese he is!