[joeyoung]

Interesting. I think "pio" is the onomatopoeia for tweet in Japanese too. It's the noise cash registers at Tokyo's Inageya supermarkets make when you use their points card.

[djfm]

And in French "piou piou" can be used colloquially to mean "bird"... Many languages seem to agree on this.

[balazsdavid987]

In Hungarian, "pee-pee-pee-pee" is used to at farms to call chicken. :) And sometimes, young woman are called "pee-pee"-s, in a playful way.