Thanks for feedback dudes.
I know for certain that mediterraneo is the Italian spelling, but am unsure regarding Spanish or any other especially due to the somewhat mixed-up WikiPedia entry:
"Mediterraneo" is the proper spanish spelling as well.
You have a TYPO, take it into account when pricing your domain. It is a good typo, though, since many people in Spain wrongly pronounces the name like that ("mediterranio"). We could say you have a phonetic typo.
That wikipedia entry (how did you find that) is in Aragonese language, a dialect spoken in a little part of Spain. More info here:
Yes, this is the aragonese spelling (briefly spoken by around 10,000 people) and the bad pronunciation of "mediterraneo" by many spanish people. That's it.