How do you say speak french in english?

There are a few ways to say "speak French" in English, depending on the context and nuance you want to convey:

Formal:

* Speak French - This is the most straightforward and neutral way to say it.

* Be fluent in French - This emphasizes the ability to communicate effectively in French.

Informal:

* Know French - A more casual way to say it.

* Can speak French - This implies a level of proficiency but not necessarily fluency.

* Talk French - A very casual way to say it.

Examples:

* "I speak French fluently."

* "Do you know French?"

* "My friend can speak French."

* "She talks French with her grandmother."

The best way to say it will depend on the situation and the level of formality you want to use.