Lush article on onomatopeia

This article from the Guardian Language section takes a lighthearted trip through different language's onomatopoeic words. What do you say dogs 'say'? What about chickens? What do guinea pigs say? Are words coined with any regard to onomatopoeia? Angelica - how did you create/pick the words you used in your investigation to be paired with real words by the participants? Was onomatopoeia involved?