Are there any web fonts with full character support (Korean, Chinese, Japanese glyphs)?

Question

Design

The bottom line is that characters of different languages ​​​​must be on the same page at the same time.

1. How to be in that case? Are there "Best Practices" for this?
   
2. Should You Use Web Fonts? (Chinese firewall blocks google, including google web fonts)
   
3. What about mobile platforms?
   
4. Is it possible to make a web page look the same on computers with different language packs (Russian version of Windows, Korean version of Windows, Chinese version of Windows)? Those. glyphs of different languages ​​must be the same. What about other platforms (Linux, BSD, Android, MacOS, iOS)?
   

A search on the world wide web gave a small recommendation about Chinese: Chinese Standard Web Fonts: A Guide to CSS Font Fa... , but the article is from 2012 and its relevance for today is not entirely clear, as well as what if there are also Korean and Japanese glyphs ?
UPD. Is it possible to see the fonts that are installed by default in Windows XP/7/8/8.1/10 somewhere? Those. If you install Chinese/Japanese/Korean Windows from scratch, what fonts can you look for? The same is of interest for mobile platforms and Mac OS/Linux.

Answer 1

As for all characters, I don't know.
But here's what's from Google:
https://www.google.com/get/noto/help/cjk/
And the same under the Adobe brand:
https://github.com/adobe-fonts/source-han-sans /

Answer 2

CSS has such a thing as unicode-range. In short: a font is sliced ​​into many pieces, each serving a different portion of the Unicode character range. Depending on the characters that are on the page, the browser will load only the necessary font files, avoiding unused ones. This is how Google Fonts works, you can do it yourself, but it's pretty painful. In older browsers there were problems, in all modern ones this thing works without problems. In your case, it might make sense to download all the ranges from Google Fonts for the Noto font and serve them from your own domain.
I recommend reading about unicode-range and much more here: https://developers.google.com/web/fundamentals/per...