MLang2 filter is not being processed

[marcusgreen]

The multilanguage 2 filter is not being processed as expected.

See this ticket on the repository for that filter
iarenaza/moodle-filter_multilang2#27

An update will need to be checked with other filters and with images. It would also be useful if the included xml file of sample questions had ones that can be tested against those filters.

Will add text that shows this issue in action at some point.