I see that there is an "Insert Special Character" option from the text editor where "é" can be selected, but would it be possible to create a "Caché" button that inserts the word "Caché"? I can see cases where mixing these words can be confusing. An even more important reason would be searching. If the word "Cache" is used instead of "Caché" in many places, it may be difficult to find information about the "Cache".
If a "Caché" button existed, it may encourage the correct spelling to be used. I am not sure if this is a real problem, but I see the possibility of it happening.