Having more than one culture alias setup in the url

Hey, I am currently trying to setup an alias for a sub culture of french and the url structure needs to be.domain.com/fr/chHowever the page is 404'ing as Kentico recognizes the culture as /fr/ and then the page name as /ch/ and therefor is 404'ng. We need the fr/ch to be a culture route on its own.Is their a way around this issue?Regards, Dominic