Formal:
* Traduire en français: This is the most direct and formal translation.
* Faire la traduction en français: This emphasizes the act of doing the translation.
Informal:
* Traduire en français: This is the most common and informal way to say it.
* Traduire en langue française: This is more specific, emphasizing the use of the French language.
Other options:
* Traduire du [language] en français: This specifies the source language. For example, "Traduire de l'anglais en français."
* Faire passer [text/document] en français: This emphasizes the transformation of something into French.
Ultimately, the best translation depends on the specific situation and the desired level of formality.