Just now I created a thread in the French forum of Wordreference. The quoted text is a part of my post.Last week, our company was going to export some goods to France, but the Chinese forwarder told us that they were unable to input the address into their computer system because there are several letters in French, i.e. à，ç，é．
Originally I wrote there are several French letters, but later I changed it to there are several letter in French, because I learned French letter can refer to condom in English slang.
I wonder if I wrote several French letters, would it look funny to native speakers of English?
Here's the URL link about French letter in slang