"Je parle français." (I speak French.)
However, you can also be more specific and list the languages you speak:
* "Je parle français et anglais." (I speak French and English.)
* "Je parle français, anglais et espagnol." (I speak French, English, and Spanish.)
If you are just learning French, you can say:
* "J'apprends le français." (I am learning French.)
You can also add a bit of context, for example:
* "Je parle français, mais pas très bien." (I speak French, but not very well.)
* "Je parle français couramment." (I speak French fluently.)
Remember to adjust the answer to your own situation and level of French.