Hello! I want to know how native speakers consider these words in colloquial English as below. I know they are unacceptable in formal English writing, such as business letter, academic writing.
- Ya
- Hiya
- See ya!
- gonna, wanna
1 Do most educated people say these in daily communciation?
2 Are these words accepted in polite society?
3 Do most ordinary people speak them frequently?
Many thanks!

