Diploma

Yes, you can, provided your subjects have credits similar to the degree offered in UK or Ireland. Choose the universities, prepare your transcript and write to them to know how you can pursue the degree. You may also take help of any career counselor.

The main difference between Bachelor of dental hygiene and Diploma in dental hygiene is after completing Bachelor's course you will be awarded a degree whereas in a diploma course you will end up becoming a diploma holder. A value of a degree is more than a Diploma. Alongside, the amount of knowledge and learning you gain in a degree course is more then a diploma course.

Hi Emran,
Universities abroad have bridging courses or foundation programs in English, designed for students not meeting English language requirements. You must visit college websites and check for these details on the same. Please email them for IELTS requirement and such bridging courses, colleges will guide you accordingly based on your profile.

Hi Shreyansh,
It may be good for some and not worth it for others. Every person has different skills, interests and career goals. Basically, know that pharmacy technician is an assistant to the top or main pharmacist. My suggestion would be that you check career outcomes related to this field, see if it actually interests you before applying. Pharmacy overall is a good field in Canada with a lot of scope. Read these
http://www.nahb.ca/blog/pharmacy-technicians-canadas-highest-demand-careers
http://www.nahb.ca/blog/pharmacy-technicians-canadas-highest-demand-careers8
Please check job portals etc. to know about the requirements etc.