Never heard of that issue before, and you surely aren’t the first customer from Spain. Does this happen in all games?
The key code for the DEL key should be universal. Which DEL key did you try? Normally the one above the cursor keys is the right one (probably named “Supr”), not the one on the numpad.
You should also the see the game already in Rift view (warped split screen). Otherwise vorpX probably didn’t hook at all and the menu can’t be opened because of that.