The Japanese word for cat, "neko" sounds almost exactly like the english word for "nickle", the five cent coin put out by the U.S. treasury. This is because both cats and nickles are small. This means the american language is similar to the Japanese, so there must be some common origin behind the words! Ha ha, take that, linguistics!
I'm sorry, but I put my opinion into humor and do not mean to offend anyone, I was just providing a funny example of how I was thinking.
I'm not trolling, I swear. :[