Thanks for the info about how most Europeans can read English, the stuff about subbed English shows, and the suggestions for labeling and listing the Game Cases.
I didn't know they taught English in most grade schools, over there.
The current setup, on my site, is to show five thumbnails for each product, that are click-able, so you can see larger photos.
At least one of them will show actual carts in actual cases; that should help.
I also have plain-text Region Info in brackets, in the Title Area, of some of the Game Case's Tables, like (USA/CAN/MEX) and (EU/JP).
I need to tweak that a bit.
I like the idea about showing Cart Shapes, and have non-compatible ones circled and a / through it.
I could add a row of small cart-shaped icons to each Game Case's Table, to accomplish that.

I'm a big fan of visual-aid, and love websites where you can tell, at a glance, what products are compatible with what stuff.