Add text next to me-too button

We don't use the Me Too button, but Lithium makes it easy to adjust just about any string.  If you go to Studio > Text Editor and click the "Show text keys" button that will turn on the "string bomb."  Every string in Lithium will be replaced with its property key name.  You can then change the value of that text property.  Take the property, and add it to the Text Properties box.  For example:

rating.forum_topic_metoo.0.title = Like +1

We regularly add text to displays using jQuery on the client side.  Again, we don't use the Me Too button, but here is some sample code we are using to add users' full names within thread display pages.  I'm sure you can adapt this to extend your Me Too button (or perhaps you can use the "string bomb" thing I mentioned in my other reply).

<@liaAddScript>
;(function($) {
$(document).ready(function() 
{
   $('div.lia-message-author-username').each(function(index) {
       var uname = $(this).find('.lia-user-name-link').attr('title');
       if (typeof uname === 'undefined' || uname == '') {
           uname = $(this).find('.lia-user-name-link').text();
       }
       
       var currElem = $(this);
       $.ajax({
           type: "GET",
           url: "/restapi/vc/users/login/" + uname + "/profiles",
           data: ({
               "xslt": "json-v2.xsl"
           }),
           success: function(result) {
               var first_name = "";
               var last_name = "";
               $.each(result.response.profiles.profile, function(pindex, profile) {
                   if (profile.name == "name_first") {
                       first_name = profile.$;
                   }
                   if (profile.name == "name_last") {
                       last_name = profile.$;
                   }
               });
               
               if (first_name != "" && last_name != "") {
                   $('<div class="lia-message-author-fullname"><b>' + first_name + ' ' + last_name + '</b></div>').insertAfter(currElem);
               }
           }
       });
   });
});
})(LITHIUM.jQuery);
</@liaAddScript>

Another (slightly hacker style) solution might be to simply add the string using the CSS ":after" pseudo property, e.g. something along the lines of:

.lia-rating-image-active:after { content:" Click here if you have the same question."; }