MacOS High Sierra: Missing Input Sources and Character Viewers

Quite a few users have reported missing Chinese and other input sources after updating to MacOS 10.13 High Sierra.   I've found that a Safe Boot often fixes this.  If not, Apple has published an article that should do the trick.

Main Page Updated for High Sierra

I have updated the main Multilingual Mac web page to cover MacOS 10.13 High Sierra here.

Comments and corrections welcome.