Many users report Alt + Shift not changing language in Windows 11. Issue affects both keyboard shortcuts and input language settings
Fn key enables accessing second assignments of keys. Fn+F1-F12 keys provide additional functions. Keys with Fn and F Lock offer two sets of commands. F Lock light controls standard vs alternate commands
Access System Settings > Keyboard > Input Sources. Click plus sign to add new languages. Enable "Show input menu in menu bar" toggle. Click flag or language icon in menu bar to switch
Open Settings by swiping down from top screen. Navigate to System or General management. Select Language & input, then Language. Add desired language and select dialect. Set as default or move to top of list
Fn Lock key may be found on keyboard with lock icon or FnLk. Hold Fn key while pressing Fn Lock to disable Fn requirement. Function keys can be restored by pressing Fn and Fn Lock again
Windows launches Start menu when Alt key is pressed instead of Windows. Issue commonly occurs with multimedia keyboards. Problem may be caused by keyboard driver issues