I read inthis blog post this sentence

Symfony Inflector component converts words between their singular and plural forms (for now, only in English)

So I created a FrenchInflector class implementing the InflectorInterface from the String component. This inflector uses regular expressions and it is tested in the FrenchInflectorTest with a lot of the french exceptions.

Changelog has been updated, but I'm not sure I did it in the good paragraph.

I don't know if I should update the symfony/symfony-docs, but I have created an example and I could create a PR with it, if you want.

<?phpuseSymfony\Component\String\Inflector\FrenchInflector;$inflector =newFrenchInflector();$result =$inflector->singularize('dents');// ['dent']$result =$inflector->singularize('souris');// ['souris']$result =$inflector->singularize('messieurs');// ['monsieur']$result =$inflector->pluralize('cinquante');// ['cinquante']$result =$inflector->pluralize('pou');// ['poux']$result =$inflector->pluralize('cheval');// ['chevaux']

fabbot.io is detecting a typo, but this is not. The patch done by fabpot suggests to replace the french 'embarras' word by 'embarrass'. I shall not remove or replace it, because "embarras" is an invariant word.