How do we say when ll you go to sleep in Malayalam?

There are a few ways to say "when will you go to sleep" in Malayalam, depending on the context and level of formality:

Formal:

* Nee entha samayatthu nidraanu?” (നീ എന്താ സമയത്ത്‌ നിദ്രാണു?) - This is a direct translation and means "At what time are you sleeping?"

* Nee entha samyayil nirdhraanu?” (നീ എന്താ സമയിൽ നിർദ്രാണു?) - This is a slightly more formal version of the previous phrase.

Informal:

* Nee ethra naeraathu nidhraan?” (നീ എത്ര നേരത്ത്‌ നിദ്രാണു?) - This means "When are you going to sleep?".

* Entha samyayil nidraanu? (എന്താ സമയിൽ നിദ്രാണു?) - This is a more casual way of asking "When are you going to sleep?".

* Nee ethra naeraathu nidraanu? (നീ എത്ര നേരത്ത്‌ നിദ്രാണു?) - This is the most casual way to say "When are you going to sleep?" and can be used with friends or family.

Remember: Malayalam has a few different ways to express time, so you may need to adjust the phrase based on the specific situation.