> so, what you are calling “fonts” (Arial, Times) are actually called “typefaces”
Excel (and standard Windows and Office – the two are still slightly different, I think – selector controls call typefaces “Fonts” in the selector control. That doesn’t mean it is using “Fonts” the same way in the error message, but…)
the reason font menus are called font menus and not typeface menus dates back to when computers used raster fonts and had limited memory. You didn't load typefaces, you loaded the typeface/size/styles that you needed and had memory for, literally the fonts. Since that's the language people learned, that's what's in the UI