EnglishInflector example

        $propName = $association->getPropertyName();
        if (mb_substr($propName, -1) === 's' || \in_array($propName, self::PLURAL_EXCEPTIONS, true)) {
            return [];
        }

        $ref = $this->getShortClassName($this->registry->get($association->getReferenceDefinition()->getClass()));
        $def = $this->getShortClassName($definition);

        $ref = str_replace($def, '', $ref);
        $refPlural = (new EnglishInflector())->pluralize($ref)[0];

        if (mb_stripos($propName, $refPlural) === mb_strlen($propName) - mb_strlen($refPlural)) {
            return [];
        }

        return [
            $definition->getClass() => [
                sprintf(
                    'Association %s.%s does not end with a \'s\'.',
                    $definition->getEntityName(),
                    $association->getPropertyName()
                ),