diff --git a/openlp/core/ui/formattingtagcontroller.py b/openlp/core/ui/formattingtagcontroller.py
index f2fca420a..9470e8859 100644
--- a/openlp/core/ui/formattingtagcontroller.py
+++ b/openlp/core/ui/formattingtagcontroller.py
@@ -166,5 +166,6 @@ class FormattingTagController(object):
             return None, end
         if end and end != end_html:
             return translate('OpenLP.FormattingTagForm',
-                             'End tag %s does not match end tag for start tag %s') % (end, start_html), None
+                             'End tag %(end)s does not match end tag for start tag %(start)s') % \
+                             {'end': end, 'start': start_html}, None
         return None, None
diff --git a/openlp/plugins/songs/lib/importers/wordsofworship.py b/openlp/plugins/songs/lib/importers/wordsofworship.py
index a7ee57187..4f9076072 100644
--- a/openlp/plugins/songs/lib/importers/wordsofworship.py
+++ b/openlp/plugins/songs/lib/importers/wordsofworship.py
@@ -108,8 +108,8 @@ class WordsOfWorshipImport(SongImport):
                 if song_data.read(19).decode() != 'WoW File\nSong Words':
                     self.log_error(source,
                                    str(translate('SongsPlugin.WordsofWorshipSongImport',
-                                                 'Invalid Words of Worship song file. Missing "WoW File\\nSong '
-                                                 'Words" header.')))
+                                                 'Invalid Words of Worship song file. Missing "%s" header.'
+                                                 % 'WoW File\\nSong Words')))
                     continue
                 # Seek to byte which stores number of blocks in the song
                 song_data.seek(56)
@@ -118,8 +118,8 @@ class WordsOfWorshipImport(SongImport):
                 if song_data.read(16).decode() != 'CSongDoc::CBlock':
                     self.log_error(source,
                                    str(translate('SongsPlugin.WordsofWorshipSongImport',
-                                                 'Invalid Words of Worship song file. Missing "CSongDoc::CBlock" '
-                                                 'string.')))
+                                                 'Invalid Words of Worship song file. Missing "%s" '
+                                                 'string.' % 'CSongDoc::CBlock')))
                     continue
                 # Seek to the beginning of the first block
                 song_data.seek(82)