inland spousal sponsorship

Does CIC check with governements in the country that the spouse comes from to verify marital status in that country?

For example if the spouse is from Japan, does CIC check with the japnese goverment the marital status of that person in Japan?

Does CIC have the capacity to do this or is this what CSIS does in the background check? Or does CIC not care about the vital statitic record in the country of origin?

What infomation from the PR application does CIC actually verify with the country of origin of the spouse besides criminality/security?

Is inland processing only done in Canada or is the file sent to the country of the spouse for PR processing???

Please advise