This is glossary dungeon.
Glossary means words.
dungeon meanse monsters.
Monsters are composed by words, your equipment, the reward, they are all composed by words.
They are composed by the words from languages you wish to learn.
We all know that memorize words is a hard work.
player do some test/or do no test, and then fight a monster, if you beat the monster, you get rewards, you must pass correspond test to acclaim the rewards. And fight advancing monsters. And beside the items, after you beat a monster, you'll get coin rewards. You can use them to buy stuffs in the shop.