Hi there,
you use in your SfResources this field for all task-counts:
https://blazor.syncfusion.com/documentation/kanban/localization/

Hence we get something like this in German:

That's not correct.
We must distinguish between singular and plural in the header:
0 task
s - 0 Aufgabe
n1 task - 1 Aufgabe
2+ task
s - 2+ Aufgabe
nI suggest the following implementation:

Regards,
Volker