Don't talk like entire Google is a Kannadiga's property. The fact why Kannada is not included in Google is, there is no much Kannadigas working in google. Thats it.
Kannadigas population in google is lessthan 1%, whereas morethan 25% of Tamilians working there.
And one morething, though google offered 5 languages to search, the results sites will be in all languages.