Caffe latte (Italian), café au lait (French) and café con leche (Spanish) are all ways of saying “coffee with milk added to it”.
Of course, latte is now shorthand for the popular coffee house drink that starts with a shot (or two if you like a stronger drink) of espresso and has steamed milk and a small amount of foam added to it.
You can also make lattes at home if you have ground espresso coffee beans, a way to brew them, milk and a milk frothing implement. First, steam the milk to your desired temperature and then brew the espresso. Pour the espresso in the cup, add the steamed milk and froth it a bit on top. If you are a fan of flavoring, you can also add chocolate, hazelnut or many other delicacies to spice up your drink.