Thank you, mark, for the reply. Well, i got what you are saying about learning different forms of a word. I guess, you are right. I’ll see if i can use tags to make things more comfortable for me.
And for the features like showing tag’s on the flashcards, you should make it customizable, so everybody would be happy. Let’s say if you simply put a check box “show tag’s” somewhere on the flashcards view screen - that would be be great, so if i do not like the tags to be shown, i can leave the box unchecked and vice versa. I think, this is the best way to solve all the other person-to-person varied things too. Just leave an option to chose, so nobody is hurt 
You’re doing a great job, i really like the system. I also hope there will always be at least a part of it we can use for free