"Have fun" is the most commonly used phrase to express "玩得开心" in Engpsh.
This phrase is widely used in Engpsh-speaking countries and has become a common expression for wishing someone to have a good time.
Here are some examples of its usage:
Example 1:
Engpsh: Have a great time at the party!
Chinese: 在聚会上玩得开心！
Example 2:
Engpsh: I hope you have fun on your vacation.
Chinese: 我希望你度假玩得开心。
Example 3:
Engpsh: Just relax and have fun.
Chinese: 放松一下，玩得开心。