What is the best practice for localization site?

[deli-ght]

I'm serving international service and there are localized pages that serve different lauguage for same contents. Each language pages include its language with its url path, such as '/en/contents' , '/ko/contents'.
I just wonder which one is the best way to inject a jsonld object for each pages.

1. write values in page's own language using inLanguage property

// korean page
{
  ...
  name: 한국어 페이지
  inLanguage : "ko"
  ...
}

// english page
{
  ...
  name: English page
  inLanguage : "en"
  ...
}

2. write values in all languages that I serve with @language keyword

// korean page
{
  ...
  name : {
     "ko" : "한국어 페이지",
     "en" : "english page"
  ...
}

If there is other better example, welcome for the feedback. Thank you!