So it looks like the plugin looks at a defined list of “options”, which I’m assuming is where you put “Adrian Mato Gondelle”. I would think you just need to encode the accented á
To do that http://tlt.its.psu.edu/suggestions/international/web/codehtml.html#accent has the html encoding info. Hope this helps!
You need to do some kind of transliteration, both on the suggestion list and on the user input.
Hope this helps, at least you know what you could search for with Google.