sign diacritico is incorrectly written and it should be written as "diacritic" being its meaning:
Graphic sign that confers a special value to other signs written, like accents acute, grave and circumflex, Diaeresis, spirits soft or harsh Greek, n tilde, the point, coma, point and coma, the brief, the macron Diacritico, from the Greek day-: by, through and krino: judge, separate, differentiate: what separates, what differentiates.