Language is an example of a valuable factor within the immigration process, especially when combined with other factors (such as higher education). This number may weigh even more if the applicant is married or in a stable relationship.
The language is also valuable because it counts points in several sections of the Comprehensive Ranking System (CRS ): within Email Data human capital factors; within marital factors (if married or in a civil partnership); within the “combinations” of skills transfer and within additional factors.
Education can count CRS points both if you studied exclusively outside of Canada, and also if you have a Canadian post-secondary credential. You can improve your initial education score by obtaining additional credentials, for example, by completing another degree, or by obtaining additional Educational Credential Assessments (ECAs) for existing degrees.

An ECA is required to obtain CRS points for education obtained outside of Canada.
For Federal Skilled Worker Class candidates educated outside of Canada, only an ECA is required from the primary candidate to enter the pool. For candidates in the Federal Skilled Trades Class or Canadian Experience Class, no ECA is required to enter the Express Entry pool.
And for those who are going to study in Canada, did you know that studying at College in the country and applying for the Post Graduation Work Permit (PGWP) can further improve your profile?
The great advantage of studying at a public college in Canada is precisely the opportunity to apply for the PGWP, which is a work authorization that you receive for up to 3 more years after graduating.
This will help you in several aspects, such as: your level of education, knowledge of the language, adaptability, due to having studied and stayed in the country and, mainly, work experience, since you will have had the chance to have stayed in the country after completing studies working full time.