Hi Aly Hudson, Welcome to Microsoft Community. Thank you for posting an inquiry about a problem with the language switching key combination not working.
We understand your frustration. This reduced the convenience of the device experience.
We performed testing in two different brands of devices running Windows 11 24H2 (OS Build 26100.2894) with the latest update KB5050009 installed. In our testing, we were unable to reproduce the issue for the time being.
The symptoms you are currently experiencing seem to indicate some sort of configuration file corruption, conflict, or driver corruption, signal conflict for a specific key.
When a problem occurs with a device, restoring the device to a relatively early state to minimize the impact of potential software environment changes is always the preferred option.
To open System Restore, Use the keyboard shortcut Windows +R, type rstrui.exe and press Enter.
- In the Restore system files and settings box, select Next
- Select the restore point that you want to use in the list of results. If you don’t see the restore point that you want to use, select the Show more restore points check box to see more restore points.
- Optionally, select Scan for affected programs.
- Once you find the proper restore point, select Next > Finish.
- After the restore point is applied, Windows restarts automatically.
To uninstall an update,
- In the Settings app on your Windows device, select Windows Update> Update history> Uninstall updates.
- On the list that appears, select update you want to remove, and then select Uninstall.
- **Note:**Some updates cannot be uninstalled.
Some hardware devices may come with some dedicated drivers and firmware to implement "macro" functions and key mapping functions, which may unexpectedly cause specific keys to fail to function as expected in certain software environments.
In our tests, the right Shift and Alt combinations work the same.
If possible, you can compare the right key combinations to see if they work the same.
A software-emulated keyboard can often be used as an alternative to narrow down the scope of the problem analysis.
Windows has a built-in Accessibility tool called the On-Screen Keyboard (OSK)
- Go to Start, then select Settings > Accessibility> Keyboard, and turn on the On-Screen Keyboardtoggle. A keyboard that can be used to move around the screen and enter text will appear on the screen. The keyboard will remain on the screen until you close it.
Safe Mode starts Windows with a minimal set of drivers and services, making it easier to identify problems caused by third-party software or settings changes.
- When you restart your PC, press and hold the Shiftkey while you select Power> Restart.
- The device will boot into Windows Recovery Environment.
- Once in Windows RE, select Troubleshoot> Advanced options> Startup Settings> Restart.
- Select Restart, once the device reboots, in the Startup Settings screen pick one of the available options, or press Enter to boot Windows normally.
A local account provides an independent user environment on your device. Observing under a different user profile helps to understand if the problem is specific to a corrupted user profile. Using Command Prompt ensures you can bypass user interface issues. To create a new local account via Command Prompt:
- Press Win or Win + S, type Command Prompt, right-click it, and choose Run as administrator.
- Execute the command to create a new account, replace <Username> with the desired username, and <Password> with the desired password.
net user "<Username>" "<Password>" /add - Execute the command to promote the account to admin level, replace <Username> with the desired username.
net localgroup Administrators "<Username>" /add
If I misunderstand your situation, feel free to correct me and share the information.Best Regards,Kyo.Y - MSFT | Microsoft Community Technical Support