In Old French, a 'bougette' was a small purse. English turned it into 'budget', the minister's bag of financial papers, and French later borrowed it back with that financial meaning. 'Sport' comes from Old French 'desport', amusement. And 'tennis' probably comes from 'tenez!', 'here, take it!', called out by the server in real tennis. These words made the round trip across the Channel.
In Kuşköy, a mountain village in northern Turkey, people talk across valleys by whistling Turkish. A 2015 study showed that whistled Turkish draws on both hemispheres fairly evenly, whereas spoken Turkish relies mostly on the left. The physical form of the signal, it turns out, matters to the brain.
Speech has no gaps between words. In 1996, researchers played 8-month-old babies a continuous stream of made-up syllables for just two minutes. The infants picked out the 'words' by tracking which syllables tend to follow one another. That's probability calculation, done without a calculator or any visible effort.