How do you say nothing is new in french?

There are a few ways to say "nothing is new" in French, depending on the context and nuance you want to convey:

Formal:

* Il n'y a rien de nouveau. (Literally: There is nothing new.)

* Il n'y a pas de nouveauté. (Literally: There is no novelty.)

Informal:

* Rien de nouveau. (Literally: Nothing new.)

* Pas de nouvelles. (Literally: No news.)

* C'est toujours pareil. (Literally: It's always the same.)

More idiomatic:

* Le train-train quotidien. (Literally: The daily grind, implies a monotonous routine)

* Toujours la même rengaine. (Literally: Always the same old song, implies boredom and repetition)

The best option for you will depend on the situation and the level of formality you require.