It sounds like one of your variables in the faq.php files have text outside of the standard variable definition.
Properly formatted:
$ubbt_lang['B_POLL'] = "Putting a poll in your post is simple.";
Messed up would be something like:
$ubbt_lang['B_POLL'] = "Putting a poll in" your post is simple.";
or
$ubbt_lang['B_POLL'] = "Putting a poll in"; your post is simple.";
The fix, in this case, would be to simply restore your faq.php file in the languages/english/ folder from the UBB.threads install archive; any customization you've made to this file will need to be reapplied.