I mean I don't know if you noticed but there's a certain style to them, even in the English translation, that sounds like these are written by educated people.

不知道你们是否注意到，这些信写得挺有文采，英译本也不例外，听上去像出自有文化人之手。

youdao

By joining a new club or going to events where you know English will be spoken, you will need to use a different register of English.

参加一个新的俱乐部或者可以讲英语的活动，你将需要使用不同类型的英语；

youdao

Don't let an opportunity to speak English pass you by because you don't know what to say in response to this common greeting!

千万不要因为不知道怎样回答这个普通的问候语而错失和外国朋友说英语的良机。

youdao

As such there are still, in places, the languages of the original inhabitants extant (well, not so much original inhabitants, as they had been wiped out by those incomers the English later conquered, but you know what I am getting at).

FORBES: The Perils of Email