Locale incorrect when using Arc web browser

[WizBangCrash]

Describe the bug The luxon.DateTime.now().locale function incorrectly reports the browser locale as 'en-US' when using the Arc web browser. The locale has been set to 'en-GB' and the function window.navigator.language returns 'en-GB'.

To Reproduce

1. Install Arc and set the default locale to anything other than 'en-US' e.g. 'en-GB'
2. Open a website using luxon in the Arc browser
3. Open the developer console and run luxon.DateTime.now().locale
4. The function returns 'en-US'
5. Run window.navigator.language
6. The function returns 'en-GB'

Actual vs Expected behavior See steps 1 to 6 above

Desktop (please complete the following information):

• OS: macOS Ventura 13.5.2
• Browser: Arc 1.9.1 with Chromium Engine 117.0.5938.88
• Luxon version: 3.3.0
• Your timezone: "[Europe/London]"

Additional context Running the same commands on the same webpage running in Safari or Brave return the locale en-GB

[diesieben07]

Please check the result of new Intl.DateTimeFormat().resolvedOptions().locale, which is what Luxon uses to determine your system locale.

[WizBangCrash]

Please check the result of new Intl.DateTimeFormat().resolvedOptions().locale, which is what Luxon uses to determine your system locale.

Thanks for the quick response.

The result in the Arc browser is: 'en-US' and in the Safari browser is 'en-GB'

[diesieben07]

Sounds like a bug in the Arc browser then. Unfortunately I cannot test this myself, because the browser is not available for download at the moment. I suggest you file a bug report with them.

[WizBangCrash]

Thanks @diesieben07 . I have raised it as a bug with Arc and am awaiting a response from them.

[WizBangCrash]

For info. Arc confirmed it was a bug at their end. It will be fixed in v1.15 of the browser.