The information you have here is flawed for 5th Edition.
http://dnd5e.wikidot.com/wondrous-items:spell-scroll
"A spell scroll bears the words of a single spell, written in a mystical cipher. If the spell is on your class’s spell list, you can read the scroll and cast its spell without providing any material components. Otherwise, the scroll is unintelligible."
This is incorrect.
According to the 5th Edition Dungeon Master's Guide page 139
"The most prevalent type of scroll is the spell scroll, a spell stored in written form, but some scrolls, like the scroll of protection, bear an incantation that isn't a spell. Whatever its contents, a scroll is a roll of paper, sometimes attached to wooden rods, and typically kept safe in a tube of ivory, jade, leather, metal, or wood.
A scroll of a consumable magic item. Unleashing the magic in a scroll requires using an action to read the scroll. When its magic has been invoked, the scroll can't be used again. Its words fade, or it crumbles into dust.
Unless a scroll's description says otherwise, ANY CREATURE THAT CAN UNDERSTAND A WRITTEN LANGUAGE CAN READ THE SCRIPT ON A SCROLL AND ATTEMPT TO ACTIVATE IT."
Please consider repairing this error.