Fix memrise for right-to-left languages (developed during an intense Hebrew study session in a café playing Sigur Rós). Userscript - load into Panda Styler or another such extension.

FixMemrise.js

function fixBoxes() {
  // fixes punctuation in a string: mixed LTR/RTL text causes punctuation at the end to appear at the beginning of the string
  function fix(str) { 
    var match = str.match(/^[\!\?"]+/); // find !, ?, and " at the beginning of a string
    if (match) { 
      return str.substring(match[0].length) + match[0]; // and move it to the end
    } 
    return str;
  }
  
  function isHebrew(str) {
    // ok, this won't hold up to scrutiny, but the main thing is making sure it's not english and this does the job
    return !str.match(/[a-z]/i); 
  }
  
  if (window.location.toString().indexOf("hebrew") != -1) {
    var selectors = ['#boxes > div > div.thing-show.show-more > div > div.row.column.primary.bigger > div.row-value > div', '#boxes > div > ol > li > span.val.bigger', '#boxes > div > div.question-row.clearfix > div.qquestion.qtext.bigger'];
    
    selectors.forEach(function(selector) {
      if (!isHebrew($(selector).text())) { 
        return;
      }
      
      $(selector).each(function(index, el) {
        if (!$(el).data('rtl-fixed')) {
          console.log($(el)); // this won't spam your console, don't worry
          
          $(el).css('direction', 'rtl').css('text-align', 'right').attr('dir', 'rtl').attr('direction', 'rtl').css('display', 'inline-block');
          $(el).text(fix($(el).text())); // fix punctuation
          
          $(el).data('rtl-fixed', true);
        }
      });
    });
  }
}

setInterval(fixBoxes, 200); // gods this was a hackaround