Surprisingly for me Cortana is Showing the Beta Vesion
on my Lumia 620 Indian CV
i hav cyan and Update 1 on 620..
Unfortunately i cant use it as i cannot download the Speech language..
Dont know weather its a bug or something..
please change the region in uk or us and change the language to english uk or us.. thn u will get cortana beta ver. it should take time that the beta ver. to come in india. so change the settings and use the beta version for temprory