How do you say sleep well in Hindi?

There are a few ways to say "sleep well" in Hindi, depending on the context and level of formality:

Formal:

* शुभ रात्रि (Shubh Raatri): This is the most common and polite way to say good night. It literally translates to "auspicious night."

* स्वप्न सुंदर (Swapna Sundar): This means "beautiful dream" and is a more poetic and affectionate way to say good night.

Informal:

* रात अच्छी सो (Raat Achchi So): This is a more casual way to say "sleep well." It literally translates to "sleep well tonight."

* सो जाओ (So Jao): This means "go to sleep" and is a very informal way to say good night.

You can also use a combination of these phrases, for example, "शुभ रात्रि, अच्छे से सो जाओ" (Shubh Raatri, Achchhe Se So Jao), which means "Good night, sleep well."

The best way to choose the right phrase is to consider the context and your relationship with the person you are talking to.