"Special Characters" is a common term in the United States for any character outside the 26 letters used in US English such as à, é, î, œ, ü, ñ, sometimes ÿ.
Is there a Special Characters button in Canvas?
It is possible to enter “Special Characters” in Canvas, but there not a “Special Character” button.
How do I add Special Characters in Canvas?
Special Characters can be added to Canvas using the RCE (Rich Content Editor)