I speak two languages, Finnish and Swedish. The Finnish word for it is "poika" and the Swedish one is "pojke". There are different version for it on both languages, but these are the most common ones :)
I speak mostly English (since I live in America) but I also speak a little French, Spanish, Swahili, Polish, and German. (And no, I'm not a linguist...I just got bored one summer and, well, I taught myself a few languages!)
English-boy Spanish-nino with a ~ over the 2nd n Polish-chlopiec with a ` in the middle of the l French-garcon with a squiggly thing under the c German-junge Swahili-mvulana
'Boy' sounds like it's referring to a little kid. I say 'guy', which sounds 更多 like it's referring to teens and adults. 'Boy' to me sounds kind of immature.