Screens which display badges do not apply any filtering. Consequently features like the "multi-lingual filter " don't work properly against badge text rendering badges non-functional in multi-language environments. See screenshots in attachments section. Those

tags are filters enabled through the multi-lingual filter plugin here: https://moodle.org/plugins/filter_multilangsecond

It appears the badges code needs to be updated to allow filtering via changes like:

"$OUTPUT->variable($var->name);". would become: "$OUTPUT->variable(format_string($var->name));"