Windows 10 Region and Language

Microsoft has never fully understood countries where multiple languages are spoken, but it has worsened with the most recent Windows 10 incarnations.

When you do a fresh install of Windows 10, you get two region / language dependent answers:

• Let's start with region. Is this right? > Belgium
• Is this the right keyboard layout? > Belgian (period)

And you end up with a system with French...

Where are all settings located, or say, hidden...

Settings > Time & Language

• > Settings
• Time & Language
  • v1803 Region & language:
    • Country or region: Belgium
    • Languages
      • Windows display language: English (United States)
      • Preferred languages:
        • English (United States)
        • Nederlands (België)
    • Advanced keyboard settings
      • Override for default input method: Dutch (Belgium) - Belgian (Period)
    • Administrative language settings:
      • Copy settings...
        • Current user:
          • Display language: English (United States)
          • Input language: Dutch (Belgium) - Belgian (Period)
          • Format: Dutch (Belgium)
          • Location: Belgium
        • If the values for the current user are as mentioned above, then check the Welcome screen and system accounts and the New user accounts checkbox.
  • v1809 Region:
    • Region: Belgium
    • Regional format: Dutch (Belgium)
  • v1809 Language:
    • Windows display language: English (United States)
    • Preferred languages:
      • English (Belgium) -- no longer available on 18/05/'19...
      • Nederlands (België)
      • English (United States)
      • Français (Belgique)
    • Administrative language settings
      • Copy settings...
        • Current user:
          • Display language: English (United States)
          • Input language: Dutch (Belgium) - Belgian (Period)
          • Format: Dutch (Belgium)
          • Location: Belgium
        • If the values for the current user are as mentioned above, then check the Welcome screen and system accounts and the New user accounts checkbox.
    • Spelling, typing, & keyboard settings
      • Advanced keyboard settings:
        • Override for default input method: Dutch (Belgium) - Belgian (Period)
        • Language bar options:
          • Advanced Key Settings tab: in the To turn off Caps Lock section, choose the Press the SHIFT key option
          • Advanced Key Settings tab: click on Change Key Sequence...
            • Switch Input Language: Left Alt + Shift → Not Assigned
            • Switch Keyboard Layout: Ctrl + Shift → Not Assigned
  • v1903 & v1909 Region:
    • Region: Belgium
    • Regional format: Dutch (Belgium)
  • v1903 & v1909 Language:
    • Windows display language: English (United States)
    • Preferred languages:
      • English (United States)
      • Nederlands (België)
    • Administrative language settings
      • Copy settings...
        • Current user:
          • Display language: English (United States)
          • Input language: Dutch (Belgium) - Belgian (Period)
          • Format: Dutch (Belgium)
          • Location: Belgium
        • If the values for the current user are as mentioned above, then check the Welcome screen and system accounts and the New user accounts checkbox.
    • Spelling, typing, & keyboard settings
      • Advanced keyboard settings:
        • Override for default input method: Dutch (Belgium) - Belgian (Period)
        • Language bar options:
          • Advanced Key Settings tab: in the To turn off Caps Lock section, choose the Press the SHIFT key option
          • Advanced Key Settings tab: click on Change Key Sequence...
            • Switch Input Language: Left Alt + Shift → Not Assigned
            • Switch Keyboard Layout: Ctrl + Shift → Not Assigned
          • WARNING: even with the key sequences disabled, it remains possible to switch between the preferred languages by pressing + spacebar - you could overcome this by adding an AZERTY keyboard to English (United States) - but I don't do this
  • v20H2 Region:
    • Country or region: Belgium
    • Regional format: Dutch (Belgium)
  • v20H2 Language:
    This screen now first gives an overview of the active languages using five clickable tiles:
    

    Windows display English (United States)	Apps & websites Dutch (Belgium)	Regional format Dutch (Belgium)
    Keyboard Dutch (Belgium)	Speech English (United States)

    • click on Windows display: focus moves down on this settings page to Windows display language
      • English (United States)
    • click on Apps & websites: focus moves down on this settings page to Preferred languages
      • Dutch (Belgium) (required for date fields to display the European way, e.g. birthday in the People app - otherwise I'd choose English as primary language for apps & websites)
      • English (United States)
    • click on Regional format: focus redirects to the Region settings page
      • see higher
    • click on Keyboard: focus redirects to the Keyboard settings page
      • Dutch (Belgium) - Belgian (Period)
    • click on Speech: focus redirects to the Speech settings page
      • English (United States)
    • Related settings: Administrative language settings
      • click on the Copy settings... button
        • Current user:
          • Display language: English (United States)
          • Input language: Dutch (Belgium) - Belgian (Period)
          • Format: Dutch (Belgium)
          • Location: Belgium
        • If the values for the current user are as mentioned above, then check the Welcome screen and system accounts and the New user accounts checkbox.
        • Confirm by clicking on the OK button.
    • Related settings: Spelling, typing, & keyboard settings
      • scroll down to and click on Advanced keyboard settings:
        • Override for default input method: Dutch (Belgium) - Belgian (Period)
        • then click on the Language bar options link:
          • Advanced Key Settings tab: in the To turn off Caps Lock section, choose the Press the SHIFT key option
          • Advanced Key Settings tab: click on the Change Key Sequence... button
            • Switch Input Language: Left Alt + Shift → Not Assigned
            • Switch Keyboard Layout: Ctrl + Shift → Not Assigned
          • WARNING: even with the key sequences disabled, it remains possible to switch between the preferred languages by pressing + spacebar - you could overcome this by adding an AZERTY keyboard to English (United States) - but I don't do this

Default System UI Language

Issue the following command in an elevated terminal window:

dism /online /get-intl

Detect Windows setup language

In PowerShell, issue the following command:

[CultureInfo]::InstalledUICulture