laminas-i18n ships with a set of internationalization-related filters.
These filters are based on Laminas component for filtering and normalizing data and files: laminas-filter.
The concept and the basic usage of the filters can be found in the documentation of laminas-filter.
The filtering support of laminas-i18n depends on the laminas-filter component, so be sure to have it installed before getting started:
$ composer require laminas/laminas-filter