Ma dov'è l'accento? La 'e' è chiusa o aperta? Sì, ora c'è una estensione anche per questo.
This extension marks the stressed syllable and/or the 'e' and 'o' vowels if they are 'open', in order to show the correct pronunciation of Italian words, when it's not entirely clear only from the spelling.
(ex: there's no way to know it is "SCEgliere", but "veDEre")
The user can choose different representations for the two functions.
It is true that the chiusura is not uniform throughout Italy, but at least this one is used by native speakers *somewhere*.
The linguistic data was obtained from the Italian Festival Modules.
(Copyright (C) 2001-2005 by the IFM Development Team)(GPL License)
(source available on Github)
That data is actually meant for a text-to-speech system. Well, we're using it to make a human-based one =)