If we try to creat the Good and Features articles on Czech Wikipedie, we have several typographical rules, what kind of peaces of text cannot be on the end of the line. So normally in wikitext, we were adding entity. But there is still no way how to do it in VisualEditor. I dont think the future newbies will use wikitext much, tu be able to do this.
I guess other languages also uses non-breakable space in certain moments.