Sign in with Google in the language you picked
The language you set in Settings now carries through to the Google sign-in screen, and browsers set to Simplified or Traditional Chinese land on the right one.
You set Chief to Korean, then hit Sign in with Google and got an English screen. Or you opened Chief for the first time with your browser set to Traditional Chinese and read Simplified wording instead.
Google sign-in language
Chief used to report English to the sign-in layer no matter what you had chosen. Your language choice in Settings now travels with you, so Google's sign-in screen appears in the language you are reading Chief in.
Simplified and Traditional Chinese detection
A browser asking for Simplified or Traditional Chinese fell through to the generic Chinese translation on a first visit. Chief now matches the regional request, so a browser set to Traditional Chinese gets Traditional wording. Neither variant outranks the other: you get Traditional only if your browser asks for Traditional first.
Language names in the picker
The language menu in Settings lists each of the seventeen languages under its own name, written in that language, so you can find yours without reading the current interface language.
If you signed in and saw the wrong language along the way, open Settings, pick your language, and it holds from there.