What do you say to wish your fellows a good lunch? [duplicate]

grammaticality phrase-requests formality greetings

Solution 1:

There is no common English phrase akin to bon appetit. In fact the most common way of wishing people to enjoy their meal in the English-speaking world is to use the French phrase bon appetit, which is so commonly used in English that it appears in English dictionaries.

For something more "native" to English, sometimes people will simply say "enjoy!" though that is much less specific to eating a meal than bon appetit.

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