Homestays are chosen considering several factors like, what is the reason the homestay wishes to host a student, where they live, whether it is an appropriate home (size and amenities). Other factors that are considered are gender, age and preference of the student.
Please note that Canada is a country of immigrants from other countries, who bring their cultures and experiences with them. Host families are from a variety of racial and religious backgrounds. It is common for Canadians to speak English with an accent.