The ones used in peninsular languages have base keys assigned to them (except for the diaeresis, which had to be displaced in favor of the apostrophe sign ( ' ), as it's used with higher frequency [specially in catalan]) .
Los usados en los idiomas peninsulares tienen asignaciones de teclas base (excepto la diéresis, que debió ser sacrificada en favor del caracter ' (apóstrofo), que es usado con mayor frecuencia [especialmente en catalán]) .