You have made a good point. I also think that ignoring comments on your own rating page should be a thing and luckily it is a very simple query to filter them out. Basically, since I also collected the relation between the game id and the author I can write something that boils down to: "make a list of all comments by this person that where not on his/her game". That is the magic of databases.
I was working on the filtering problem. The problems I am having might stem from UTF-8 encoded characters, but I am not sure yet and need some more testing. In any case it's probably me doing something incredibly dumb and it simply takes a tad for me to find out what that is.
I would prefer to keep the text comment the same and work with the original, since some of them are not written with Latin characters. I can't just throw away whole comments just because they are written in a different language. I will probably even drop the spellcheck, since it is slow, limits the language to American English and doesn't really improve anything.