dism /online /add-package /packagepath:C:\LangPack\en-us.cab (Replace the path with your actual file location)
Copy the language pack to a local folder. For simplicity, create C:\LangPack\en-us.cab . windows 10 english language pack offline installer
Press Win + X , then select Windows Terminal (Admin) or Command Prompt (Admin) . dism /online /add-package /packagepath:C:\LangPack\en-us