It seems to be throwing the following warnings for each row but does show the output it's supposed to return.
Warning: in_array() expects parameter 2 to be array, null given in /var/www/html/wiki/maintenance/language/languages.inc on line 209 Warning: in_array() expects parameter 2 to be array, null given in /var/www/html/wiki/maintenance/language/languages.inc on line 211