How to know which enchantment is which on Minecraft?

I'm aware of how to enchant. I used the alphabet translation to find out what the words mean. I translated "demon elemental curse" and I got efficiency IV and unbreaking III for a pickaxe. WHAT? Are there titles that mean certain results? Usually I just go with a random enchantment, but I'd really like to understand how to know what is what.

Minecraft computer game

The characters on the enchantment table are completely random, and they don't affect the enchantment that you will get.