The should be presented mainly, mostly and primarily in their native form. The form for currently set language should be additional. It's a no-brainer which makes demand for using flags unnecessary, almost making it absurd to use them.
But, wait. 语言设定 is "Language settings" and 重置设备 is "Reset device". So the problem here is a bit different, right?
It's the convention on sites to put the flags as a top-level element (but you could put "English" there just as easily). But on any device with a menu, the flags are usually only on the language list.
Exactly, that's also how Apple (I'm starting to feel bad to constantly mention them) does it, the native form is "normal font face", the translated one is in lighter grey.
The problem being posed by 'peterhi is not identifying a particular language in a language selection list. The problem is finding your way over to that language selection list in the first place when presented with a UI in a language you can't read. Imagine you land on a website with the language set to (say) Esperanto, how do you navigate through that to change the language to (say) English?
But, wait. 语言设定 is "Language settings" and 重置设备 is "Reset device". So the problem here is a bit different, right?