diff --git a/src/common/config.py b/src/common/config.py
index 5978b11b8..9943b5e17 100644
--- a/src/common/config.py
+++ b/src/common/config.py
@@ -167,7 +167,7 @@ class Config:
 		'key_up_lines': [opt_int, 25, _('How many lines to store for Ctrl+KeyUP.')],
 		'version': [ opt_str, defs.version ], # which version created the config
 		'search_engine': [opt_str, 'http://www.google.com/search?&q=%s&sourceid=gajim'],
-		'dictionary_url': [opt_str, 'WIKTIONARY', _("Either custom url with %%s in it where %%s is the word/phrase or 'WIKTIONARY' which means use wiktionary.")],
+		'dictionary_url': [opt_str, 'WIKTIONARY', _("Either custom url with %s in it where %s is the word/phrase or 'WIKTIONARY' which means use wiktionary.")],
 		'always_english_wikipedia': [opt_bool, False],
 		'always_english_wiktionary': [opt_bool, True],
 		'remote_control': [opt_bool, True, _('If checked, Gajim can be controlled remotely using gajim-remote.'), True],
diff --git a/src/gajim-remote.py b/src/gajim-remote.py
index 0a2beadd0..3e7032ec1 100755
--- a/src/gajim-remote.py
+++ b/src/gajim-remote.py
@@ -409,8 +409,9 @@ class GajimRemote:
 		if command in self.commands:
 			command_props = self.commands[command]
 			arguments_str = self.make_arguments_row(command_props[1])
-			str = _('Usage: %s %s %s \n\t %s') % (BASENAME, command,
-					arguments_str, command_props[0])
+			str = _('Usage: %(basename)s %(command)s %(arguments)s \n\t %(help)s')\
+				% {'basename': BASENAME, 'command': command,
+				'arguments': arguments_str, 'help': command_props[0]}
 			if len(command_props[1]) > 0:
 				str += '\n\n' + _('Arguments:') + '\n'
 				for argument in command_props[1]:
@@ -494,12 +495,14 @@ class GajimRemote:
 		args = self.commands[self.command][1]
 		if len(args) < argv_len:
 			send_error(_('Too many arguments. \n'
-				'Type "%s help %s" for more info') % (BASENAME, self.command))
+				'Type "%(basename)s help %(command)s" for more info') % {
+				'basename': BASENAME, 'command': self.command})
 		if len(args) > argv_len:
 			if args[argv_len][2]:
-				send_error(_('Argument "%s" is not specified. \n'
-					'Type "%s help %s" for more info') %
-					(args[argv_len][0], BASENAME, self.command))
+				send_error(_('Argument "%(arg)s" is not specified. \n'
+					'Type "%(basename)s help %(command)s" for more info') %
+					{'arg': args[argv_len][0], 'basename': BASENAME,
+					'command': self.command})
 		self.arguments = []
 		i = 0
 		for arg in sys.argv[2:]:
diff --git a/src/groupchat_control.py b/src/groupchat_control.py
index f824d01db..f136025be 100644
--- a/src/groupchat_control.py
+++ b/src/groupchat_control.py
@@ -145,8 +145,8 @@ class PrivateChatControl(ChatControl):
 				dialogs.ErrorDialog(
 					_('Sending private message failed'),
 					#in second %s code replaces with nickname
-					_('You are no longer in group chat "%s" or "%s" has left.') % \
-					(room, nick))
+					_('You are no longer in group chat "%(room)s" or "%(nick)s" has '
+					'left.') % {'room': room, 'nick': nick})
 				return
 
 		ChatControl.send_message(self, message)
@@ -1062,7 +1062,8 @@ class GroupchatControl(ChatControlBase):
 						self.new_nick = ''
 						s = _('You are now known as %s') % new_nick
 					else:
-						s = _('%s is now known as %s') % (nick, new_nick)
+						s = _('%(nick)s is now known as %(new_nick)s') % {
+							'nick': nick, 'new_nick': new_nick}
 					# We add new nick to muc roster here, so we don't see 
 					# that "new_nick has joined the room" when he just changed nick.
 					# add_contact_to_roster will be called a second time 
@@ -1211,7 +1212,8 @@ class GroupchatControl(ChatControlBase):
 				if newly_created and print_status in ('all', 'in_and_out'):
 					st = _('%s has joined the group chat') % nick_jid
 				elif print_status == 'all':
-					st = _('%s is now %s') % (nick_jid, helpers.get_uf_show(show))
+					st = _('%(nick)s is now %(status)s') % {'nick': nick_jid,
+						'status': helpers.get_uf_show(show)}
 			if st:
 				if status:
 					st += ' (' + status + ')'
@@ -1553,9 +1555,9 @@ class GroupchatControl(ChatControlBase):
 				'optionally displays a reason. Does NOT support spaces in '
 				'nickname.') % command, 'info')
 		elif command == 'me':
-			self.print_conversation(_('Usage: /%s <action>, sends action to the '
-				'current group chat. Use third person. (e.g. /%s explodes.)') % \
-				(command, command), 'info')
+			self.print_conversation(_('Usage: /%(command)s <action>, sends action '
+				'to the current group chat. Use third person. (e.g. /%(command)s '
+				'explodes.)') % {'command': command}, 'info')
 		elif command == 'msg':
 			s = _('Usage: /%s <nickname> [message], opens a private message window'
 				' and sends message to the occupant specified by nickname.') % \
@@ -2321,4 +2323,4 @@ class GroupchatControl(ChatControlBase):
 		else:
 			self.revoke_owner(widget, jid)
 
-# vim: se ts=3:
\ No newline at end of file
+# vim: se ts=3:
diff --git a/src/message_window.py b/src/message_window.py
index 48acffa11..e7745042a 100644
--- a/src/message_window.py
+++ b/src/message_window.py
@@ -405,7 +405,7 @@ class MessageWindow(object):
 
 		title = 'Gajim'
 		if label:
-			title = _('%s - %s') % (label, title)
+			title = '%s - %s' % (label, title)
 
 		if window_mode == MessageWindowMgr.ONE_MSG_WINDOW_PERACCT:
 			title = title + ": " + control.account
@@ -1088,4 +1088,4 @@ May be useful some day in the future?'''
 			ctrl.parent_win = mw
 			mw.new_tab(ctrl)
 
-# vim: se ts=3:
\ No newline at end of file
+# vim: se ts=3: