Formal:
* Parler français: This is the most direct and common way to say "speak French".
* Avoir le français comme langue maternelle: This means "to have French as a native language".
Informal:
* Parler français couramment: This means "to speak French fluently".
* Savoir parler français: This means "to know how to speak French".
Other options:
* Être francophone: This means "to be a French speaker" and is often used to describe someone who speaks French as their first language.
* Connaître le français: This means "to know French", and is often used to describe someone who has a basic understanding of the language.
The best way to choose the right phrase depends on the situation. For example, if you're asking someone if they speak French, "Parlez-vous français?" is a good choice. If you're telling someone that you speak French, "Je parle français" is a good choice.