I use
ONLYOFFICE: desktop editors: 9.0.4.50 (x64 exe)
OS: windows 10 Pro 22H2
If I type Japanese in spreadsheet, convert, then type the right arrow, the same word will appear in next cell.
Other case, If I type Japanese, convert, then type the right arrow, the cursor will move, then type the left arrow, the same word will appear in next cell.
recorded video : ONLYOFFICE
Hello @nishigaki, 
Thank you for reporting the issue with Japanese text input in ONLYOFFICE Desktop Editors and providing the video! It’s very helpful and should assist us in reproducing the problem for further investigation.
I’ll notify you as soon as we have updates.
Hey @nishigaki, 
We’ve tried to reproduce the problem in both web and desktop versions but haven’t been able to so far.
Could you share the regional settings you’re using in ONLYOFFICE Desktop Editors and in your Windows 10 Pro system (e.g., language, region, and keyboard input settings)? This might help us pinpoint what’s going on.
I just updated OS to Windows 11 Pro 24H2.
language and keyboard settings are:
The behavior has changed a little.
- Enter “あした” and type a convert key then “明日” will appear.
- Enter right arrow then “明日” will appear in next cell too.

Hey @nishigaki, 
Big thanks for sharing the updated details and screenshots about your language and keyboard settings!
I really appreciated as we dig into this.
I’ll keep you posted on any updates regarding this input issue. 
Hello @Nikolas
The device is always powered on.
It’s not difficult to reproduce and happens all the time.