Sorting in Grid with diacritics

Is there a possibility to configure sorting in grid with diacritic characters?

I use polish UTF-8 characters and I would like letter Ł to be right after L but not at the end of the list.

You may try to create your own custom sorting function that will follow the required behavior.
Here you can find a tutorial about creating a custom sorting function:
docs.dhtmlx.com/grid__sorting.ht … ngfunction