diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index 4dba53e..ec3cd60 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -106,20 +106,20 @@
     var responseText;
     var readyStateText;
     if (xmlhttp.status) {
-      statusCode = "\n" + Drupal.t("An AJAX HTTP error occurred.") + "\n" + Drupal.t("HTTP Result Code: !status", {'!status': xmlhttp.status});
+      statusCode = "\n" + Drupal.t("An AJAX HTTP error occurred.") + "\n" + Drupal.t("HTTP Result Code: @status", {'@status': xmlhttp.status});
     }
     else {
       statusCode = "\n" + Drupal.t("An AJAX HTTP request terminated abnormally.");
     }
     statusCode += "\n" + Drupal.t("Debugging information follows.");
-    pathText = "\n" + Drupal.t("Path: !uri", {'!uri': uri});
+    pathText = "\n" + Drupal.t("Path: @uri", {'@uri': uri});
     statusText = '';
     // In some cases, when statusCode === 0, xmlhttp.statusText may not be
     // defined. Unfortunately, testing for it with typeof, etc, doesn't seem to
     // catch that and the test causes an exception. So we need to catch the
     // exception here.
     try {
-      statusText = "\n" + Drupal.t("StatusText: !statusText", {'!statusText': $.trim(xmlhttp.statusText)});
+      statusText = "\n" + Drupal.t("StatusText: @statusText", {'@statusText': $.trim(xmlhttp.statusText)});
     }
     catch (e) {
       // Empty.
@@ -129,7 +129,7 @@
     // Again, we don't have a way to know for sure whether accessing
     // xmlhttp.responseText is going to throw an exception. So we'll catch it.
     try {
-      responseText = "\n" + Drupal.t("ResponseText: !responseText", {'!responseText': $.trim(xmlhttp.responseText)});
+      responseText = "\n" + Drupal.t("ResponseText: @responseText", {'@responseText': $.trim(xmlhttp.responseText)});
     }
     catch (e) {
       // Empty.
@@ -140,9 +140,9 @@
     responseText = responseText.replace(/[\n]+\s+/g, "\n");
 
     // We don't need readyState except for status == 0.
-    readyStateText = xmlhttp.status === 0 ? ("\n" + Drupal.t("ReadyState: !readyState", {'!readyState': xmlhttp.readyState})) : "";
+    readyStateText = xmlhttp.status === 0 ? ("\n" + Drupal.t("ReadyState: @readyState", {'@readyState': xmlhttp.readyState})) : "";
 
-    customMessage = customMessage ? ("\n" + Drupal.t("CustomMessage: !customMessage", {'!customMessage': customMessage})) : "";
+    customMessage = customMessage ? ("\n" + Drupal.t("CustomMessage: @customMessage", {'@customMessage': customMessage})) : "";
 
     /**
      * Formatted and translated error message.
diff --git a/core/modules/ckeditor/js/ckeditor.js b/core/modules/ckeditor/js/ckeditor.js
index f67ed62..ab924ce 100644
--- a/core/modules/ckeditor/js/ckeditor.js
+++ b/core/modules/ckeditor/js/ckeditor.js
@@ -34,7 +34,7 @@
       // label so that screen readers say something that is understandable
       // for end users.
       var label = $('label[for=' + element.getAttribute('id') + ']').html();
-      format.editorSettings.title = Drupal.t("Rich Text Editor, !label field", {'!label': label});
+      format.editorSettings.title = Drupal.t("Rich Text Editor, @label field", {'@label': label});
 
       // CKEditor initializes itself in a read-only state if the 'disabled'
       // attribute is set. It does not respect the 'readonly' attribute,
diff --git a/core/modules/system/js/system.modules.js b/core/modules/system/js/system.modules.js
index f9c08e4..0732e39 100644
--- a/core/modules/system/js/system.modules.js
+++ b/core/modules/system/js/system.modules.js
@@ -64,8 +64,8 @@
 
           Drupal.announce(
             Drupal.t(
-              '!modules modules are available in the modified list.',
-              {'!modules': $rowsAndDetails.find('tbody tr:visible').length}
+              '@modules modules are available in the modified list.',
+              {'@modules': $rowsAndDetails.find('tbody tr:visible').length}
             )
           );
         }
diff --git a/core/modules/tour/js/tour.js b/core/modules/tour/js/tour.js
index c751329..127323c 100644
--- a/core/modules/tour/js/tour.js
+++ b/core/modules/tour/js/tour.js
@@ -256,7 +256,7 @@
           .find('li')
           // Rebuild the progress data.
           .each(function (index) {
-            var progress = Drupal.t('!tour_item of !total', {'!tour_item': index + 1, '!total': total});
+            var progress = Drupal.t('@tour_item of @total', {'@tour_item': index + 1, '@total': total});
             $(this).find('.tour-progress').text(progress);
           })
           // Update the last item to have "End tour" as the button.