[Webkit-unassigned] [Bug 252239] New: Currency number formatting in "en_DE" locale does not follow CLDR guidance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252239

            Bug ID: 252239
           Summary: Currency number formatting in "en_DE" locale does not
                    follow CLDR guidance
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Intel)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: andrew at andrewkincaid.com

https://cldr.unicode.org/translation/number-currency-formats/number-symbols

"For English regional locales (e.g. en_DE) where English is not the primary language of the country/region (e.g. en_DE; English as used in Germany), the number formats and date formats should follow the English formatting usage in that country/region. Often, the formatting usage in English tend to follow the British or American formatting rather than the formatting of the primary language. Consult with the English versions of prominent magazines or newspapers for guidance on date and number format usage."

Steps to Reproduce:
1. Execute the following script in the JavaScript console in Safari 16.x:
Number('1234.5').toLocaleString('en-DE', {style: 'currency', currency: 'EUR'});

Expected behavior:
Returns '€1,234.50' (same as V8 and SpiderMonkey)

Actual behavior:
Returns '1.234,50 €'

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