Hi! I'm Alessandro from Italy and I would be very grateful if someone would help me with this message. I know nothing about spanish, so I don't even try to translate it (sorry). I had tried to send him a message in english, but I didn't received an answer (though he accepted my friendship request), so I figured let's try with one in spanish.
Hi ---! I'm interested in your name on Twitter (---) and since I saw that you're not using your account, I was wondering if you would change your current user name in something like --- (or anyone you like, really). It's very simple: Log in to Twitter > From the upper right hand drop-down menu, click settings > Change the name listed in your username field on the first page you see there (the name I suggested you is available) > Save your changes. Thanks and let me know!
There's also a possibility that the message in english is not perfect, so I would appreciate any help with it.
And about the instructions in spanish this is a link from twitter: Twitter Help Center | How To Change Your Username