Wikipedia FR uses "ébauche" for stub and "Modèle" for template:
Let's keep "ébauche" then.
And "infobox" seems to be a universal term in Wikipedia:
Well, in plain French, it would rather read "boîte d'information". In current French: "Boîte d'info". Most people would understand "Infobox" though. Should we stick to the choices made by Wikipedia, although they're not always "correct" (in the sense they sometimes merely copy/paste the existing English word, counting on the fact the average francophone know enough of English to complete the scheme eg. "infobox", thus expanding "Franglish") or compete and try to forge something both plain French and adequate? There have been already a few successful attempts in the latter way: courriel, ordinateur, redingote...
++ O.