That is the intergalactic code, if you manage to decode it, it will end up like: Fire poison water earth. So decoding it will be a waste of time.
Enchantments are random, the words/ symbols mean nothing and have nothing to do with the kind of enchantment you get.
I have heard before that the words that are spelt or shown via pack have nothing to do with the actual enchantment. Is this wrong? Not completely sure but I heard from the minecraft wiki.
The language was not made by Mojang, therefore I doubt it is just random rubbish. It was made by a completely different man from a different company. It is in fact, a language. Not just random symbols.