Here's a translation I came up with. It's not a literal word-for-word, but I tried to keep the spirit of the song as much as possible. Hope this is helpful for non-Spanish speakers.
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Yeah, I know that I’m a roamer,
And I’ll probably die a loner,
But I still know you will cry.
Chorus: And cry, and cry
And cry, and cry.
Well, you say that you don’t need me,
And that you’ll never grieve me,
But I’m still saying goodbye.
Might be rich or might need money,
But I do what I want, honey,
And my own word’s the one I obey.
Well, I don’t have a castle or queen,
And there’s no one who knows what I mean,
But that’s why I’ll always be king.
A simple stone upon the road
Taught me just to bear my load
And be who I’m supposed to be.
Chorus: A rolling stone,
A rolling stone.
I once met an aging trucker,
Who said being first is for suckers,
You just have to get there in style.