"累到不想说话"可以用英文表达为 "too tired to speak" 或 "exhausted to the point of not being able to speak"。这是一种常见的说法，源于日常生活中对疲乏的描述。

例句:

"I'm too tired to speak right now, can we talk later?" (我现在太累了，我们晚点再聊吧？)
"I've been working all day and I'm exhausted to the point of not being able to speak." (我整天都在工作，现在累到说话都不行了)

注意：这种状态可以由疲劳、抑郁、焦虑等原因引起。