Leading quotation mark '„' is missing in `QuotesFilter` class construct param `$search` at ... https://github.com/yooper/php-text-analysis/blob/9b96d252f334f8ee35e067a0c7a40c24dc87a01d/src/Filters/QuotesFilter.php#L32 Instead of ... array $search = ["\'",'\"','`','“','”','’'] use ... array $search = ["\'",'\"','`','“','”','’','„']