Formal:
* Je parle français. (This is the most common and literal translation)
Informal:
* Je suis en train de parler français. (This is more literal and emphasizes the action of speaking)
* Je parle français. (This is also used informally)
More conversational:
* Je suis français. (This means "I am French" and is a more casual way to imply you are speaking French)
When talking about your ability to speak French:
* Je parle français couramment. (This means "I speak French fluently.")
* Je comprends le français. (This means "I understand French.")
* Je suis en train d'apprendre le français. (This means "I am learning French.")
Remember to choose the appropriate phrase for the situation. If you are unsure, "Je parle français" is always a safe option.