This post you linked to is inaccurate. You do not go straight from international student to getting citizenship and the selection certificate isn't for citizenship, it is for PR. First you need to get PR. Once you have lived in Canada for 3 years as a PR, you may apply for citizenship.
To see if you qualify for this immigration class they are talking about, check http://www.immigration-quebec.gouv.qc.ca/en/immigrate-settle/students/stay-quebec/application-csq/index.html If you follow the links you will find http://www.immigration-quebec.gouv.qc.ca/en/immigrate-settle/students/stay-quebec/application-csq/students-peq/language-requirements.html where it says you must speak intermediate French to be eligible.