Formal:
* Détendez-vous et profitez: This is the most literal translation and is appropriate for formal situations.
* Prenez votre temps et appréciez: This emphasizes taking your time and savoring the experience.
Informal:
* Détends-toi et amuse-toi: This is a more casual and friendly way to say it.
* Relâche-toi et profite: This is another informal option, emphasizing relaxation.
* Profite bien! This is a short and sweet way to say "Enjoy!"
Specific situations:
* Relaxez-vous et savourez le moment: This is perfect for enjoying a meal or a beautiful view.
* Détendez-vous et laissez-vous aller: This suggests letting go of your worries and simply enjoying the present moment.
The best way to say it depends on your audience and the situation.