Parler français
Here's how to break it down:
* Parler: To speak
* Français: French
You can also use the more formal "parlez français" if you're addressing someone you're being respectful to.
Here are some other ways to say it:
* Savoir parler français: To know how to speak French (more formal)
* Avoir le français: To have French (more colloquial)
The best way to choose which phrase to use depends on the context and who you are speaking to.