I don't think people should adjust themselves in their own country. They don't need to simplify their language just because there are immigrants, it is their ow

I don't think people should adjust themselves in their own country. They don't need to simplify their language just because there are immigrants, it is their own culture and day by day communication, requesting it will be rude. However when abroad they should adjust themselves to the other non native English speakers. Also regarding English tests, it goes both ways, many Chinese students in Australia pass those tests but can't communicate in English to save their lives, let alone do an academic assignments.