
Yup. If you have the Genesis Mini, just change the language settings and you'll also see better box art for several games. Dynamite Headdy is also easier and Mean Bean Machine becomes Poyo Poyo. Not sure if the other games are really all that different aside from language, but it's still the feature I'm most impressed by on the console.
You can even make Hard Corps become PROBOTECTOR (PAL regions) if you want (that one is just a name change and pallet swap IIRC).