Description:
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---
From manual page: http://www.php.net/numberformatter.formatcurrency
---

Decimal and thousand separator and currency position are based on language instead Country. 

I.e.: A website in english targeting france en_FR displays currency with british format

Test script:
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// Locale: en_GB

$fmt = new NumberFormatter( 'en_GB', NumberFormatter::CURRENCY );
echo $fmt->formatCurrency(1234567.891234567890000, "EUR")."\n";

// output €1,234,567.89


// Locale: en_FR
$fmt = new NumberFormatter( 'en_FR', NumberFormatter::CURRENCY );
echo $fmt->formatCurrency(1234567.891234567890000, "EUR")."\n";

// output €1,234,567.89, should be 1.234.567,89 €