UX = Do what I mean!

Remember the last time you heard a new word and didn't catch it on the first go. What happened next? You asked the person to pronounce it slowly, so you can record it in your brain. This sounds obvious, we do it naturally.

This is exactly what Google Translate does if you click on the speak button second time. It pronounces that word s l o w l y because Google knows that you didn't catch it the first time!