I am in a process to optimise my site for google while doing so i noticed that i am getting more and more visitors from russian search engine yandex.ru than from google.Although i even didnt submit my site to yandex
I think this is natural result on your site. May be your site came at first position on search of a particular page then automatically the traffic increase on your site.
You submit your site on some directory that link to yandex = 90% reason Just lucky - 10% reason I try exploring more on yandex. Thanks.
It isn't often in the world of site building that an unintentional act brings you good traffic. You most likely did submit somewhere and it did link you. I hope you are able to convert some of the traffic into whatever funnel you are directing it into for your project.