フランス語は話さないよ

I don't speak French

→ フランス語
phrase Rare #28,982
I don't speak French The subject is usually understood from context. は marks フランス語 as the topic, and よ adds emphasis or informs the listener. Depending on context, it can also mean "[they] don't speak French."
JA: 私はフランス語は話さないよ。
EN: I don't speak French.

僕の母さんフランス語は話さないよ

My mom doesn't speak French.

トム私もフランス語は話さないよ

Neither Tom nor I speak French.

仕事では普段フランス語は話さないよ

I don't usually speak French at work.

普段はフランス語は話さないよ

I don't usually speak French.