diff --git a/docroot/sites/all/modules/contrib/transliteration/transliteration.inc b/docroot/sites/all/modules/contrib/transliteration/transliteration.inc
index f09af6c..3d1e79b 100644
--- a/docroot/sites/all/modules/contrib/transliteration/transliteration.inc
+++ b/docroot/sites/all/modules/contrib/transliteration/transliteration.inc
@@ -135,7 +135,13 @@ function _transliteration_process($string, $unknown = '?', $source_langcode = NU
         elseif ($n <= 0xfd) {
           $ord = ($n - 252) * 1073741824 + (ord($sequence[1]) - 128) * 16777216 + (ord($sequence[2]) - 128) * 262144 + (ord($sequence[3]) - 128) * 4096 + (ord($sequence[
         }
-        $result .= _transliteration_replace($ord, $unknown, $source_langcode);
+        // Force the site's preferred langcode defined in settings.php
+        $sp_langcode = TRANSLIT_SITE_LANG;
+        if (!empty($sp_langcode)) {
+          $source_langcode = $sp_langcode;
+          $result .= _transliteration_replace($ord, $unknown, $source_langcode);
+        }
+
         $head = '';
       }
       elseif ($c < "\x80") {