和外国人说英语做梦怎么说

To say "I had a dream in Engpsh" in Chinese, you can say "我做了一个英文梦" (wǒ zuò le yī gè yīngwén mèng). To say "I dreamed in Engpsh" in Chinese, you can say "我在英文中做梦" (wǒ zài yīngwén zhōng zuò mèng).

It's also possible to say "我做了一个用英文的梦" (wǒ zuò le yī gè yòng yīngwén de mèng) to indicate that the dream itself was in Engpsh, rather than just the language in which you were speaking while dreaming.

It's worth noting that while it is possible to dream in a language other than one's native language, it is not uncommon for people to dream in their native language, even if they are fluent in other languages.