When the multilang filter is enabled (with "filter all string"=true), language filtering works with some quiz question types but not with all. The problem with "matching"-type questions is that the question text (the text which asks the student to do something) itself gets filtered but the matches are not processed by the multilang filter: the matches show all the <span>-tagged language alternatives instead of just showing one language at a time.
The problem was solved in previous moodle versions. Bu?t it continues in 1.93.
See the tracker page for this problem and the solution.