Is it lunch break or brake?

The correct spelling is lunch break (not lunch brake).

Deciding whether to spell it brake or break can be tricky; a “brake” is a device in a vehicle that slows it down (e.g., “I need to take my car to the shop to get the brakes checked”).

QuillBot’s free Grammar Checker will help you to avoid mixing up homophones like “brake” and “break” in your texts.