In admin/globalsettings line 110 I suggest to replace the fixed text Update settings with gT("Version settings") as shown as below.

$editsurvey .= "

"
. "\t
• <label for='updatecheckperiod'>".$clang->gT("Check for updates:")."</label>\n"
  . "\t\t\t<select name='updatecheckperiod' id='updatecheckperiod'>\n"
  . "\t\t\t\t<option value='0'";

  And in the same file line 258:
  to replace the fixed text "Enter your hostname and port, e.g.: my.smtp.com:25"
  also on the same way with gT().