In German, you say “geh schlafen” to mean “go to sleep.”
This phrase is composed of two parts: “geh,” which is the imperative form of the verb “gehen” (to go), and “schlafen,” which means “to sleep.” So when you tell someone to go to sleep, you’re essentially using a command form of the verb to indicate the action you want them to take. It’s a straightforward and commonly used phrase in everyday conversations in German-speaking countries.