 :I think of that article as being about three individual graphs. A graph family is generally an infinite thing (otherwise most of the problems one cares about like recognition etc become trivial). As for whether to translate missing French articles to the English Wikipedia (or add articles from Sage to Wikipedia): yes, this is usually a good idea. Just be sure to include reliable sources such as published journal articles that include all the claims about these graphs that you include in the article. —  