I understand how disruptive this conflict can be, especially when you rely on AutoHotkey and Windows language and voice features.
Windows allows the display language and keyboard/input layout to be managed separately. Please go to Settings > Time & language > Language & region > Vietnamese > Language options, then check whether the Vietnamese keyboard can be removed under Keyboards while retaining Vietnamese as the Windows display language. You can find the official instructions here: Manage language and keyboard/input layout settings in Windows.
To better understand the AutoHotkey issue, could you clarify whether Windows displays an “app blocked” message, or whether the AutoHotkey script runs but certain shortcuts do not respond? Please also share the affected key combination, your AutoHotkey version, and whether the issue stops after switching to English (US) with Windows key + Spacebar.
Since AutoHotkey is a third-party application, testing these details will help determine whether this is an IME shortcut conflict or an application/security restriction. While my initial response may not fully resolve the issue, I truly appreciate your cooperation as we work together toward identifying the most effective solution. Thank you so much for your understanding.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.