getCurrentWriteLanguageId example

 bool {
        if ($value !== null) {
            return true;
        }

        if ($existence->isChild() && $this->isInherited($field, $parameters)) {
            return false;
        }

        if ($existence->hasEntityName()
            && $this->definitionRegistry->getByEntityName($existence->getEntityName()) instanceof EntityTranslationDefinition
            && $parameters->getCurrentWriteLanguageId() !== Defaults::LANGUAGE_SYSTEM
        ) {
            return false;
        }

        return $field->is(Required::class);
    }

    protected function isInherited(Field $field, WriteParameterBag $parameters): bool
    {
        if ($parameters->getDefinition()->isInheritanceAware()) {
            return $field->is(Inherited::class);
        }