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[GH-ISSUE #2896] [Bug] korean letters were all broken. #1268
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AppFlowy-IO/AppFlowy#1268
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Originally created by @letyletylety on GitHub (Jun 24, 2023).
Original GitHub issue: https://github.com/AppFlowy-IO/AppFlowy/issues/2896
Originally assigned to: @LucasXu0 on GitHub.
Bug Description
When typing in Korean, I noticed that the letters were all broken.
It looks like every letter is typed multiple times.
How to Reproduce
Install the latest version of appflowy for windows
Expected Behavior
The letters must be entered correctly.
This is not an issue with the Flutter SDK itself, as other Flutter apps display Korean correctly as shown in the screenshot below.
Operating System
Windows 10
AppFlowy Version(s)
0.2.4
Screenshots
Additional Context
No response
@ewuzeyu commented on GitHub (Jun 25, 2023):
The same. also have trouble in typing Chinese and Japanese (Microsoft IME).


@annieappflowy commented on GitHub (Jun 26, 2023):
The same root cause
@LucasXu0 commented on GitHub (Jun 27, 2023):
Actually, it's a Flutter issue related to
DeltaTextInputClient. We replaced it withTextInputClientand implemented text diff ourselves.https://github.com/AppFlowy-IO/AppFlowy/assets/11863087/125a1ba6-a8cc-484a-b22c-ddf284227ff4
@letyletylety Is the event shown in the video correct?
@letyletylety commented on GitHub (Jun 27, 2023):
In the video, it seems to work fine.
Can you try typing a series of keys without hitting the space key in between?
Or could you let me know how I can test it myself?
Thanks for your quick feedback.
@LucasXu0 commented on GitHub (Jun 28, 2023):
Sure, @letyletylety. The easiest way is to test it directly in the editor.
@letyletylety commented on GitHub (Jun 28, 2023):
As you can see in the gif above, it's still not working properly.
The behavior has changed, but it still seems unusable.
https://github.com/AppFlowy-IO/AppFlowy/issues/2896#issuecomment-1609655775
In the test in this comment, if you kept typing without hitting the space key midway through, you would see the similar result.
Um...I just forked the repo and tested it. (https://github.com/letyletylety/appflowy-editor)
I tested it in release mode.
I used a virtual keyboard for the recording, but I got the same results using a physical keyboard.
@letyletylety commented on GitHub (Sep 6, 2023):
Is this issue resolved in 0.3.1? Nothing has changed at all compared to when I last posted the issue.
@LucasXu0 commented on GitHub (Sep 6, 2023):
@letyletylety I tested it on my Windows, just as shown in the video. Have you reproduced it in the latest version?
https://www.loom.com/share/60449cc32e1d4897a2b7e2f6e68e62b1
@LucasXu0 commented on GitHub (Sep 7, 2023):
@letyletylety By the way, did you use the built-in Korean IME from Microsoft? I just checked with the built-in one again, and it works well from my side.
https://www.loom.com/share/dc82d11358144973a1db511fad404b90
@letyletylety commented on GitHub (Sep 7, 2023):
@LucasXu0
I just use built-in one.
The same issue occurs on both my home PC and my work PC. Both use windows10.
In my side, nothing has changed from https://github.com/AppFlowy-IO/AppFlowy/issues/2896#issuecomment-1611640324
I wonder if this has been resolved for other CJK users in v0.3.1
As I said at the beginning, Korean characters are being input normally in other Flutter apps (probably using the default TextField Widget).
@Aiden-ee commented on GitHub (Dec 13, 2023):
@LucasXu0
was this issue fixed??
I got same situation
v0.3.9.1 (window)
@annieappflowy commented on GitHub (Jan 14, 2024):
thank you
I'm using built-in Korean IME from Microsoft, window10, appFlowy v0.4.1
I tried to type "안녕하세요" which means "hello"
It can be written by typing following characters "ㅇㅏㄴㄴㅕㅇㅎㅏㅅㅔㅇㅛ"
you can see the picture attached

@Aiden-ee commented on GitHub (Feb 7, 2024):
@annieappflowy @LucasXu0
Guys, no plan to support Korean??
@daniel080400 commented on GitHub (Feb 17, 2024):
#3540 Same issue with Chinese (Chewing), IME issue it seems
@annieappflowy commented on GitHub (Feb 19, 2024):
@Aiden-ee , we would like to support CJK input methods well.
@Aiden-ee , @daniel080400 , please specify your operating system, app version number,
@Aiden-ee, + the input method.
@daniel080400 commented on GitHub (Feb 20, 2024):
@annieappflowy same issue happened with my system.
OS: Debian 12 (bookworm)
Input conf1: ibus, ibus-chewing
Input conf2: fcitx5, fcitx5-chewing
Appflowy ver: deb pck v0.4.8
Both ibus and fcitx5 represents the same issue
@litmuschi commented on GitHub (Mar 16, 2024):
Same issue on my windows 10 system, but works fine on MacOS Sonoma.
@rileyhawk1417 commented on GitHub (Jan 25, 2025):
@litmuschi, @daniel080400 does the problem still occur in AppFlowy 0.8.2?
@Aiden-ee commented on GitHub (Mar 7, 2025):
@rileyhawk1417
This problem still occur in newest AppFlowy v0.8.5
@litmuschi commented on GitHub (Mar 7, 2025):
I'm currently using Windows 11, not Windows 10, so I'm not sure if the issue persists on Windows 10. However, I just tested it on Windows 11 with versions 0.8.2 and 0.8.5, and the issue seems to be resolved.