This is how my write mode looks now. Help…
Any chance you changed your your language preferences?
You might reset them by hitting Ctril+, and then picking the first item in the first pulldown. Dorico needs to be restarted to change languages.
Thanks, but it doesn’t work… restarted Dorico after picking English - no Change… also restarted computer - no change…
OK. We covered the PC restart. 
I assume the rest of computer isn’t in Chinese, but double check your window’s language and region settings.
You can try deleting \users<yourname>AppData\Roaming\Steinberg\Dorico folder with Dorico shutdown and then let it regenerate a fresh one.
If that fails, I’d probably uninstall and reinstall Dorico.
Sorry, I don’t have a lot of better advise–haven’t seen this one before.
Drori,
Can you think of anything (else) that you might have done - however apparently unconnected - before this happened?
I wonder whether the windows font cache somehow got out of step? The following site has an example on how to reset that: https://www.tenforums.com/tutorials/54452-rebuild-font-cache-windows-10-a.html
You could also double check that the program folder does contain a file called DoricoIcons-Regular.ttf, this gets copied there by the installer (but not actually installed as a system wide font).
Hi StefanF - Yes! did the reset you’ve suggested and everything is back to normal! Thanks so much. Thought I was about to start learning Chinese…
Please don’t let this stop you from learning chinese.