The inclusion of dir="ltr" or dir="rtl" leads to problems in the Moodle core multilang filter.

[lucaboesch]

See https://tracker.moodle.org/browse/MDL-81055

To reproduce, add the lines

            'dir ltr case EN' => [
                'English',
                '<span lang="en" class="multilang" dir="ltr">English</span><span lang="fr" class="multilang" dir="ltr">Français</span>',
                'en',
            ],

to filter/multilang/tests/filter_test.php (line 125) and run that PHPUnit test.

[srobotta]

For the moment I have removed the dir attribute in master. However, as you noted correctly, this should be fixed in the filter itself. I also believe that when we published the plugin, these attributes where working correctly.