Index: includes/logging/LogEntry.php
===================================================================
--- includes/logging/LogEntry.php	(revision 111989)
+++ includes/logging/LogEntry.php	(working copy)
@@ -462,7 +462,7 @@
 			$this->getTimestamp(),
 			$logpage,
 			$user,
-			$formatter->getPlainActionText(), // Used for IRC feeds
+			$formatter->getIRCActionText(), // Used for IRC feeds
 			$user->isAnon() ? $user->getName() : '',
 			$this->getType(),
 			$this->getSubtype(),
Index: includes/logging/LogFormatter.php
===================================================================
--- includes/logging/LogFormatter.php	(revision 111987)
+++ includes/logging/LogFormatter.php	(working copy)
@@ -77,6 +77,8 @@
 	 */
 	protected $plaintext = false;
 
+	protected $irctext = false;
+
 	protected function __construct( LogEntry $entry ) {
 		$this->entry = $entry;
 		$this->context = RequestContext::getMain();
@@ -141,6 +143,28 @@
 	}
 
 	/**
+	 * Even uglier hack to maintain backwards compatibilty with IRC bots
+	 * (bug 34508).
+	 * @see getActionText()
+	 * @return string text
+	 */
+	public function getIRCActionText() {
+		$this->irctext = true;
+		$this->plaintext = true;
+		$text = $this->getActionText();
+
+		$entry = $this->entry;
+		if ( $entry->getType() === 'delete' && $entry->getSubtype() === 'delete' ) {
+			if ( $this->canView( LogPage::DELETED_COMMENT ) ) {
+				$text .= ": " . $this->entry->getComment();
+			}
+		}
+		$this->plaintext = false;
+		$this->irctext = false;
+		return $text;
+	}
+
+	/**
 	 * Gets the log action, including username.
 	 * @return string HTML
 	 */
@@ -183,7 +207,13 @@
 	protected function getMessageKey() {
 		$type = $this->entry->getType();
 		$subtype = $this->entry->getSubtype();
-		$key = "logentry-$type-$subtype";
+		if( $this->irctext ) {
+			$key = "logentry-irc-$type-$subtype";
+		}
+		else {
+			$key = "logentry-$type-$subtype";
+		}
+
 		return $key;
 	}
 
Index: languages/messages/MessagesEn.php
===================================================================
--- languages/messages/MessagesEn.php	(revision 111324)
+++ languages/messages/MessagesEn.php	(working copy)
@@ -4709,6 +4709,29 @@
 'logentry-newusers-autocreate'        => 'Account $1 was created automatically',
 'newuserlog-byemail'                  => 'password sent by e-mail',
 
+# For IRC, see bug 34508.  Do not change
+'logentry-irc-delete-delete'              => 'deleted "$3"',
+'logentry-irc-delete-restore'             => 'restored "$3"',
+'logentry-irc-delete-event'               => '$1 changed visibility of {{PLURAL:$5|a log event|$5 log events}} on $3: $4',
+'logentry-irc-delete-revision'            => '$1 changed visibility of {{PLURAL:$5|a revision|$5 revisions}} on page $3: $4',
+'logentry-irc-delete-event-legacy'        => '$1 changed visibility of log events on $3',
+'logentry-irc-delete-revision-legacy'     => '$1 changed visibility of revisions on page $3',
+'logentry-irc-suppress-delete'            => '$1 suppressed page $3',
+'logentry-irc-suppress-event'             => '$1 secretly changed visibility of {{PLURAL:$5|a log event|$5 log events}} on $3: $4',
+'logentry-irc-suppress-revision'          => '$1 secretly changed visibility of {{PLURAL:$5|a revision|$5 revisions}} on page $3: $4',
+'logentry-irc-suppress-event-legacy'      => '$1 secretly changed visibility of log events on $3',
+'logentry-irc-suppress-revision-legacy'   => '$1 secretly changed visibility of revisions on page $3',
+'logentry-irc-move-move'                  => '$1 moved page $3 to $4',
+'logentry-irc-move-move-noredirect'       => '$1 moved page $3 to $4 without leaving a redirect',
+'logentry-irc-move-move_redir'            => 'moved $3 to $4 over redirect',
+'logentry-irc-move-move_redir-noredirect' => '$1 moved page $3 to $4 over a redirect without leaving a redirect',
+'logentry-irc-patrol-patrol'              => '$1 marked revision $4 of page $3 patrolled',
+'logentry-irc-patrol-patrol-auto'         => '$1 automatically marked revision $4 of page $3 patrolled',
+'logentry-irc-newusers-newusers'          => '$1 created a user account',
+'logentry-irc-newusers-create'            => '$1 created a user account',
+'logentry-irc-newusers-create2'           => '$1 created a user account $3',
+'logentry-irc-newusers-autocreate'        => 'Account $1 was created automatically',
+
 # Feedback
 'feedback-bugornote' => 'If you are ready to describe a technical problem in detail please [$1 report a bug].
 Otherwise, you can use the easy form below. Your comment will be added to the page "[$3 $2]", along with your username and what browser you are using.',