Symfony version(s) affected: 5.1.2

Description
The Symfony\Component\String\Inflector\EnglishInflector incorrectly pluralizes the string "coupon" to "coupa". English is not my first language and i've never heard the word "coupa" before. I've searched for the plural version of coupon and didn't find "coupa" anywhere.

How to reproduce
With these two lines the problem should be reproducable:

$inflector = new EnglishInflector();
$plural = $inflector->pluralize( "coupon" )[ 0 ];
echo $plural; // echoes "coupa"

Additional context
symfony/string 5.1.2