Firstly I would like to apologize, this topic doesn't fit neatly in any category. I have spoken Spanish for the past 20 (of 26) years of my life and I consider myself a fluent speaker, and recently got a job doing some research in Portuguese. I found out the way you say 'según' in Portuguese is 'segundo', which is just baffling. So I went to the RAE and the Spanish etymology is of course from Latin as well; 'secundum'. Can anybody explain the logic the Romans had when expressing themselves, when thdy said 'according to' they used the same word as 'second'?