Human languages are harder because there's no compiler to test variations against for hours, days and weeks. The best language learning program would be one wh

Human languages are harder because there's no compiler to test variations against for hours, days and weeks. The best language learning program would be one which listens to you speak (or write), points out critical errors, and doesn't let you progress until you find ways around them (or choose an easier/different thing to express). If we had one of those, language learning would be much, much easier.