You got to keep it same for every film. You're talking about K3, D3.. Even Maine Pyaar Kiya, Hum Aapke Hain Koun, Hum Saath Saath Hain, Diwale Dulhania Le Jayenge, Raja Hindustani, Vivah, Dil Se, Taal, Duplicate were all dubbed to south languages... Nobody added the regional collections then!!!
The criteria should be kept same for all. Not all films get dubbed. If a straight Hindi film collects 50cr, another Hindi film with dubbed versions collects 60cr while collecting 40cr from Hindi version, it doesn't mean it's ahead right? It still fell short of 10cr in Hindi version.