diff --git a/library/smarty/libs/plugins/shared.mb_str_replace.php b/library/smarty/libs/plugins/shared.mb_str_replace.php
new file mode 100644
--- /dev/null
+++ b/library/smarty/libs/plugins/shared.mb_str_replace.php
@@ -0,0 +1,54 @@
+<?php
+/**
+ * Smarty shared plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsShared
+ */
+if (!function_exists('smarty_mb_str_replace')) {
+
+    /**
+     * Multibyte string replace
+     *
+     * @param  string $search the string to be searched
+     * @param  string $replace the replacement string
+     * @param  string $subject the source string
+     * @param  int &$count number of matches found
+     *
+     * @return string replaced string
+     * @author Rodney Rehm
+     */
+    function smarty_mb_str_replace($search, $replace, $subject, &$count = 0) {
+        if (!is_array($search) && is_array($replace)) {
+            return false;
+        }
+        if (is_array($subject)) {
+            // call mb_replace for each single string in $subject
+            foreach ($subject as &$string) {
+                $string = &smarty_mb_str_replace($search, $replace, $string, $c);
+                $count += $c;
+            }
+        } elseif (is_array($search)) {
+            if (!is_array($replace)) {
+                foreach ($search as &$string) {
+                    $subject = smarty_mb_str_replace($string, $replace, $subject, $c);
+                    $count += $c;
+                }
+            } else {
+                $n = max(count($search), count($replace));
+                while ($n--) {
+                    $subject = smarty_mb_str_replace(current($search), current($replace), $subject, $c);
+                    $count += $c;
+                    next($search);
+                    next($replace);
+                }
+            }
+        } else {
+            $parts = mb_split(preg_quote($search), $subject);
+            $count = count($parts) - 1;
+            $subject = implode($replace, $parts);
+        }
+
+        return $subject;
+    }
+}