Translation principle for entities other than modResource and query translation

Any snippet that outputs a list of resources (not necessarily modResource, but also gallery files, comments, etc.) works by receiving parameters, building a database query, fetching data, processing it and returning it.

pdoTools snippets provide a way to override the class that performs the selection via a system setting.

Setting	Value
pdoFetch.class	mlFetch
pdofetch_class_path	{core_path}components/multilingual/model/multilingual/

To get translated results for resource classes other than modResource (and its subclasses), write your own class extending mlFetch, override getArray and prepareRows, and add the same selection preparation logic as in mlFetch.

Then, when using pdoResources or another custom snippet that uses the class from pdoFetch.class, you will get results translated to the current language.