Stupid question but how much Japanese do I need to know to play a Dragon Quest game?

Here is a website with all the Genki vocabulary http://www.csus.edu/indiv/s/sheaa/projec..._main.html

[EDIT] I mentioned this before in another forum but here is a website with a list of JRPG vocabulary if you're interested https://en.m.wikibooks.org/wiki/Japanese.../Videogame