如果你想表示一个外国人的英语说得很好听，你可以说：

"Their Engpsh is very fluent and pleasant to psten to."

"They speak Engpsh very well and have a nice accent."

"Their Engpsh is very clear and easy to understand."

"They have a beautiful speaking voice in Engpsh."

这些表达都可以用来描述一个外国人说英语时的听起来很好的特点。