I didn’t take this into account when I created the built in sort function, but you can fix it by adding this to your custom js:
spjs.casc.customSort.YOUR_FIELD_NAME = function(a, b) {
// Fix accented characters
return a.text.localeCompare(b.text);
};
Replace YOUR_FIELD_NAME with the internal name of your field.
I’ll get this fixed in the next release of DFFS.
Alexander