There is a semantic problem with the word chosen to represent a "column" in the content page editor. The word "module" is both confusing from a UX perspective and not an accurate description of what the section is. I can fully understand that to mobile users these may not be columns BUT that audience is the consumer and won't be aware of this wording. It's site admins on desktop environments that will find that word module problematic.
That is to say that the correct word is a column and the word column is more intuitive for users trying to learn modern site building in particular because the environment that the page editor is used in is a desktop browser and not a mobile browser.