CmdID / PowerShell / Cmdlets / Set
Set-WinLanguageBarOption
Sets the language bar type and mode for the current user account. Windows Server PowerShell reference
From the Windows Server PowerShell reference 2 parameters Its page in the reference
Parameters
-UseLegacyLanguageBarIndicates that this cmdlet sets the language bar mode to the legacy setting.-UseLegacySwitchModeIndicates that this cmdlet sets the language bar switch mode to the legacy or per-thread setting.