Hi, you indeed seem to have a Spanish keyboard. The Enter key works as usual on an Amiga Spanish keyboard, even if it's a small key and you call it "weird" ;-) There's obviously something wrong. Try to open the machine and check whether cables are properly connected. You just can assume that the "odd" keys aren't there. The Spanish is an extension of the English keyboard, not a different keyboard nor a simplification.
Best Regards,
Sexton