Comment by socalgal2
Couldn't enter Japanese into the web version. Looks like it trying to read keys directly. Copy and paste don't work. Right clicking doesn't bring up a context menu with system options so no looking up words using the locally installed dictionary. No OS level spell checking that uses the user's dictionary.
I guess all of that is TBD though I suspect based on the tech choices will be way harder than it sounds.
Copy and paste don't work on the web version, but they should work (including pasting formatting out into Office products) on desktop. Similarly for fonts. If you're using a font that contains Japanese characters it should render. It doesn't (yet) do a great job on falling back.
Try the download!