Coincidentally cha1 ("1" here means the first tone in pinyin) is a sexual innuendo alluding to sexual intercourse. The character itself, which means "to insert", has nothing to do with sex in normal usage though. And most importantly, there is virtually zero resemblance between the pronunciation of "change" and that of "cha1".

> to have sex (lit. insert).

> Source: a long list of Chinese profanity on Wikipedia.[0]

[0] https://en.wikipedia.org/wiki/Mandarin_Chinese_profanity

That reminds me to the name "KIDSEXCHANGE". [Picture of the store](http://www.webdevelopersnotes.com/blog/blog-images/kidsexcha...).

Yeah, it seems like it either doesn't match english words (probably because it assumes you already speak English since it's an English-language web site), or it is only looking for specific types of matches (swear words, etc.). I tried merder.com, since I know that "merde" is french for "shit" and it sounds like "murder.com". It caught "merde", but didn't catch "murder". I then tried "murder.com" and it was like, "Yep! Looks good! Go for it!" (I may be paraphrasing.)