「本は表紙で判断するな」"Don't judge a book by its cover!"
つまり、「人を見た目で判断するな」「物事を外見で判断してはいけない」の英語ことわざ

これに当てはまるのは「プリティ・ウーマン」では。
In her “working clothes” Vivian walks into an upscale store where the employees won’t sell her anything and asks her to leave.
As she is walking back to the hotel, d