How do you say to try learn this lesson in french?

Here are a few ways to say "try to learn this lesson" in French, depending on the nuance you want to convey:

Formal:

* Essayez d'apprendre cette leçon. (Most literal translation)

* Tentez d'apprendre cette leçon. (Slightly more formal than "essayez")

* Efforcez-vous d'apprendre cette leçon. (Emphasizes effort)

Informal:

* Essaie d'apprendre cette leçon. (You're addressing someone directly)

* Tente d'apprendre cette leçon. (Slightly more casual than "essaie")

* Apprends cette leçon. (Direct and concise, implies effort)

With a touch of advice:

* N'hésite pas à apprendre cette leçon. (Don't hesitate to learn this lesson)

* Je te conseille d'apprendre cette leçon. (I advise you to learn this lesson)

The best choice will depend on the context and the relationship you have with the person you're speaking to.