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OS: Windows 11 Home
Version: 26200.9550
The Turkish keyboard layout (QWERTY, Turkish Q) is selected.
However, when using the AltGr key—whether via the physical keyboard or the On-Screen Keyboard (osk.exe)—characters like "~", "¨", and "`" are registered as "dead keys," resulting in them appearing twice.
This causes special characters that should normally appear only once to be output incorrectly as double characters.
The installation was initiated directly with the QWERTY (Turkish Q) layout; the settings menu reflects this, and there is no trace of the Turkish F layout. (No external English keyboard has ever been connected to the computer, and no other languages are installed.)
I have experienced this same issue since I started using Windows 11 (approximately two and a half years ago), and it has never been fixed.
It has been tested on three different devices (including one running Windows 11 Pro), and the same issue occurred on all of them.
The proof lies in the fact that on any Linux distribution, special characters like "~", "¨", and "`" appear only once when using AltGr (i.e., they do not appear twice as they would with a dead key).
I believe this is likely a bug that needs to be fixed. (I plan to share this via the Windows Feedback Hub.)
Is there any way to fix this issue, either temporarily or permanently?
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Since this happens with both the physical keyboard and On-Screen Keyboard on three PCs, it is unlikely to be a hardware fault.
In Notepad, try each AltGr combination followed by Space. If that produces two characters instead of one, report the exact key sequence and result through Feedback Hub. For now, you can insert the symbols using Win + . → Symbols. I could not confirm a built-in setting that disables dead keys specifically for Turkish Q.
Hi @Alex-L
This situation is the same in many other areas, such as the browser, Notepad, cmd, powershell.exe, Windows Terminal, and Windows Search.
For this reason, I will report this via the Windows Feedback feature.
Thank you for the additional information. Since the behavior is reproducible across multiple Windows components and on multiple devices, submitting detailed feedback through Feedback Hub is the best next step.
Hopefully your Feedback Hub submission helps the Windows team determine whether this is an issue with the Turkish Q keyboard layout implementation and improve it in a future update.
