In my native language Dutch there several words written the same way but adding
e.g. an apostrof changes the meaning slightly. E.g. "een" means "a" or "an" in
Enlish and "één" means "one" in Enlish.
I would like to propose and easy way to switch between the words by introducing
kind of a synonym list. This way you don't have to remember alt codes to add
e.g. "é". I believe this is also kind of being done in M$ Word.
To implement this I've got two suggestions:

1 - Words which have a synonym in a db can get a different underline in the
actual text. Like it's being done now with misspelled words but in a different
color maybe. This way alle the synonyms can be listed in the context menu.
2 - A seperate dropdown in the main toolbar which lists all the synonyms of the
wordt the cursor is positioned on.

The first option might cause the document view to become a bit too busy. The
underline could be left out completely but imo this might cause some confusion
because you would never know for which words synonyms will be available.
To overcome the problems option two might be the best one to use. A combination
of both could be used as well of course. This way we can leave it up to the
users to enable and disable what they prefer.