In your country, is there a ‘proper’ way of speaking the language, while some accents or dialects are seen as less educated or incorrect? If so, what are they?

For example, in Turkey, Istanbul Accent considered as educated and proper way of speaking. But if you speak any other accent or dialect, you will generally considered as uneducated in the eyes of the public.

I'm wondering about this because when I was speaking with my Italian friend he told me that they don't really have that kind of terms and I'm curious about the other countries.