Add some new variable-based localisations

en.php

@@ -12,9 +12,10 @@ $LANG['page']['signup'] = 'Sign up for ByeCorps ID';
 $LANG['page']['login'] = 'Log in to ByeCorps ID';
 $LANG['page']['dashboard'] = 'Dashboard';
 $LANG['header']['hello'] = 'Hey hey {{display_name}}!';
-$LANG['footer']['executionTime'] = 'Execution time';
+$LANG['footer']['executionTime'] = '<b>Execution time:</b> {{time}} ms';
 $LANG['generic']['generic'] = 'You\'ve unlocked the generic text!';
 $LANG['generic']['error'] = 'An error occurred.';
+$LANG['idcard']['joined'] = 'Joined on {{date}}';
 $LANG['error']['generic'] = 'No error message provided.';
 $LANG['error']['loggedIn'] = 'You\'re already logged in.';
 $LANG['error']['notLoggedIn'] = 'You\'re not logged in';