MyBB Community Forums

How i can change unread and total when you receive a pm with a only number that change when you receive a pm without editing the language variables? Is it possibile i want to show only a number that change when you receive a pm without touch the language variables

{$mybb->user['totalpms']} for total number of users messages (unread + read)
{$mybb->user['unreadpms']} for unreaded messages