Many years ago, a neighbour of mine had her grandchildren come to stay for an extended period - I believe they were about two and four. Thing is, the children lived in the UK and my neighbour is in Spain - the children had some Spanish but being young, were not always easy to understand in Spanish and her english was non-existent at the time. She had me on fast dial to work out what they wanted on occasion. Queue an evening phone call from a very frustrated granny asking me what her grandson wanted for supper - he was by this stage crying and I had to go round to find out what he wanted. He wanted scrumply axe - and granny couldn't for the life of her find out what it was. Not only did i have to translate, I had to give her the recipe, as scrambled eggs is not a dish eaten in Spain!
My son when four, and sharing DH's passion for motorbikes and all the language this entails, once shouted out while in the car, and a large bike passed us "Come on, give it some willy!!!"