I was thinking the second language on the left might be Chinese, but Japanese makes sense, too. I was lost on the Korean. Greek I had a pretty good idea of. What's the last one on the right? Something like Hebrew or Arabic, maybe?
As for the deleted scenes, I'll post a link below that's helpful. You have to start by going into Diagon Alley (the Snowy Owl on the Disc 2 menu screen). Then you have to highlight the right sequence of bricks to open the wall - I had to go back and watch the scene from the movie to get it. It's something like two on the left side of the indented bricks and one on the top, and you go clockwise. Once you're in Diagon Alley, be sure to highlight and click on the key at the bottom of the Gringott's sign - my sister had to tell me to do that. It's fun playing with wands in the wand shop; I got Mahogany. Jim Dale will give you some instructions as you go, and it was pretty straightforward once you got through Diagon Alley.