What would be the best French translation for "rationale", in the sense given on the Wikipedia page (that doesn't have any foreign language equivalent) ? At first I'd think "motivations" or "choix techniques" but I'm really not sure. I'm a French native, but that term has always puzzled me...
The meaning is well described on the page, I'll just add that it is frequently used for software design, to describe the initial choices that led to some design.