diff --git a/cps/about.py b/cps/about.py
index 7c61dbd0..85a924e2 100644
--- a/cps/about.py
+++ b/cps/about.py
@@ -35,6 +35,11 @@ try:
     from flask_login import __version__ as flask_loginVersion
 except ImportError:
     from flask_login.__about__ import __version__ as flask_loginVersion
+try:
+    import unidecode
+    unidecode_version = _(u'installed')
+except ImportError:
+    unidecode_version = _(u'not installed')
 
 about = flask.Blueprint('about', __name__)
 
@@ -54,6 +59,7 @@ _VERSIONS = OrderedDict(
     SQLite=sqlite3.sqlite_version,
     iso639=isoLanguages.__version__,
     pytz=pytz.__version__,
+    Unidecode = unidecode_version
 )
 _VERSIONS.update(uploader.get_versions())
 
diff --git a/cps/helper.py b/cps/helper.py
index 4e7f3efb..e909086e 100644
--- a/cps/helper.py
+++ b/cps/helper.py
@@ -785,4 +785,4 @@ def get_download_link(book_id, book_format):
 ############### Database Helper functions
 
 def lcase(s):
-    return unidecode.unidecode(s.lower())
+    return unidecode.unidecode(s.lower()) if use_unidecode else s.lower()
diff --git a/cps/translations/de/LC_MESSAGES/messages.mo b/cps/translations/de/LC_MESSAGES/messages.mo
index 0c3c0054..dbe4f708 100644
Binary files a/cps/translations/de/LC_MESSAGES/messages.mo and b/cps/translations/de/LC_MESSAGES/messages.mo differ
diff --git a/cps/translations/de/LC_MESSAGES/messages.po b/cps/translations/de/LC_MESSAGES/messages.po
index 9e712e40..eb5c17b6 100644
--- a/cps/translations/de/LC_MESSAGES/messages.po
+++ b/cps/translations/de/LC_MESSAGES/messages.po
@@ -5,20 +5,30 @@
 # FIRST AUTHOR OzzieIsaacs, 2016.
 msgid ""
 msgstr ""
-"Project-Id-Version:  Calibre-Web\n"
+"Project-Id-Version: Calibre-Web\n"
 "Report-Msgid-Bugs-To: https://github.com/janeczku/Calibre-Web\n"
-"POT-Creation-Date: 2019-07-26 17:19+0200\n"
-"PO-Revision-Date: 2019-06-22 19:54+0200\n"
+"POT-Creation-Date: 2019-08-06 18:35+0200\n"
+"PO-Revision-Date: 2019-08-06 18:36+0200\n"
 "Last-Translator: Ozzie Isaacs\n"
 "Language: de\n"
 "Language-Team: \n"
-"Plural-Forms: nplurals=2; plural=(n != 1)\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Babel 2.7.0\n"
+"X-Generator: Poedit 2.2.3\n"
 
-#: cps/about.py:70
+#: cps/about.py:40
+msgid "installed"
+msgstr "Installiert"
+
+#: cps/about.py:42 cps/uploader.py:213 cps/uploader.py:214 cps/uploader.py:218
+#: cps/uploader.py:222 cps/uploader.py:226
+msgid "not installed"
+msgstr "Nicht installiert"
+
+#: cps/about.py:76
 msgid "Statistics"
 msgstr "Statistiken"
 
@@ -276,125 +286,133 @@ msgstr "Google Drive Setup is nicht komplett, bitte versuche Google Drive zu dea
 msgid "Callback domain is not verified, please follow steps to verify domain in google developer console"
 msgstr "Callback Domain ist nicht verifiziert, bitte Domain in der Google Developer Console verifizieren"
 
-#: cps/helper.py:79
+#: cps/helper.py:53
+msgid "Installed"
+msgstr ""
+
+#: cps/helper.py:56
+msgid "Not installed"
+msgstr ""
+
+#: cps/helper.py:81
 #, python-format
 msgid "%(format)s format not found for book id: %(book)d"
 msgstr "%(format)s Format für Buch-ID %(book)d nicht gefunden "
 
-#: cps/helper.py:91
+#: cps/helper.py:93
 #, python-format
 msgid "%(format)s not found on Google Drive: %(fn)s"
 msgstr "%(format)s von Buch %(fn)s nicht auf Google Drive gefunden"
 
-#: cps/helper.py:98 cps/helper.py:206 cps/templates/detail.html:41
+#: cps/helper.py:100 cps/helper.py:208 cps/templates/detail.html:41
 #: cps/templates/detail.html:45
 msgid "Send to Kindle"
 msgstr "An Kindle senden"
 
-#: cps/helper.py:99 cps/helper.py:117 cps/helper.py:208
+#: cps/helper.py:101 cps/helper.py:119 cps/helper.py:210
 msgid "This e-mail has been sent via Calibre-Web."
 msgstr "Diese E-Mail wurde durch Calibre-Web versendet."
 
-#: cps/helper.py:110
+#: cps/helper.py:112
 #, python-format
 msgid "%(format)s not found: %(fn)s"
 msgstr "%(format)s nicht gefunden: %(fn)s"
 
-#: cps/helper.py:115
+#: cps/helper.py:117
 msgid "Calibre-Web test e-mail"
 msgstr "Calibre-Web Test-E-Mail"
 
-#: cps/helper.py:117
+#: cps/helper.py:119
 msgid "Test e-mail"
 msgstr "Test-E-Mail"
 
-#: cps/helper.py:132
+#: cps/helper.py:134
 msgid "Get Started with Calibre-Web"
 msgstr "Loslegen mit Calibre-Web"
 
-#: cps/helper.py:134
+#: cps/helper.py:136
 #, python-format
 msgid "Registration e-mail for user: %(name)s"
 msgstr "Registrierungs-E-Mail für Benutzer %(name)s"
 
-#: cps/helper.py:148 cps/helper.py:150 cps/helper.py:152 cps/helper.py:160
-#: cps/helper.py:162 cps/helper.py:164
+#: cps/helper.py:150 cps/helper.py:152 cps/helper.py:154 cps/helper.py:162
+#: cps/helper.py:164 cps/helper.py:166
 #, python-format
 msgid "Send %(format)s to Kindle"
 msgstr "Sende %(format)s an Kindle"
 
-#: cps/helper.py:168
+#: cps/helper.py:170
 #, python-format
 msgid "Convert %(orig)s to %(format)s and send to Kindle"
 msgstr "Konvertiere %(orig)s nach %(format)s und sende an Kindle"
 
-#: cps/helper.py:208
+#: cps/helper.py:210
 #, python-format
 msgid "E-mail: %(book)s"
 msgstr "E-Mail: %(book)s"
 
-#: cps/helper.py:210
+#: cps/helper.py:212
 msgid "The requested file could not be read. Maybe wrong permissions?"
 msgstr "Die angeforderte Datei konnte nicht gelesen werden. Evtl. falsche Zugriffsrechte?"
 
-#: cps/helper.py:317
+#: cps/helper.py:319
 #, python-format
 msgid "Rename title from: '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr "Umbenennen des Titels '%(src)s' zu '%(dest)s' schlug fehl: %(error)s"
 
-#: cps/helper.py:327
+#: cps/helper.py:329
 #, python-format
 msgid "Rename author from: '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr "Umbenennen des Authors '%(src)s' zu '%(dest)s' schlug fehl: %(error)s"
 
-#: cps/helper.py:341
+#: cps/helper.py:343
 #, python-format
 msgid "Rename file in path '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr "Umbenennen der Datei im Pfad '%(src)s' nach '%(dest)s' ist fehlgeschlagen: %(error)s"
 
-#: cps/helper.py:367 cps/helper.py:377 cps/helper.py:385
+#: cps/helper.py:369 cps/helper.py:379 cps/helper.py:387
 #, python-format
 msgid "File %(file)s not found on Google Drive"
 msgstr "Datei %(file)s wurde nicht auf Google Drive gefunden"
 
-#: cps/helper.py:406
+#: cps/helper.py:408
 #, python-format
 msgid "Book path %(path)s not found on Google Drive"
 msgstr "Buchpfad %(path)s wurde nicht auf Google Drive gefunden"
 
-#: cps/helper.py:623
+#: cps/helper.py:625
 msgid "Waiting"
 msgstr "Wartend"
 
-#: cps/helper.py:625
+#: cps/helper.py:627
 msgid "Failed"
 msgstr "Fehlgeschlagen"
 
-#: cps/helper.py:627
+#: cps/helper.py:629
 msgid "Started"
 msgstr "Gestartet"
 
-#: cps/helper.py:629
+#: cps/helper.py:631
 msgid "Finished"
 msgstr "Beendet"
 
-#: cps/helper.py:631
+#: cps/helper.py:633
 msgid "Unknown Status"
 msgstr "Unbekannter Status"
 
-#: cps/helper.py:636
+#: cps/helper.py:638
 msgid "E-mail: "
 msgstr "E-Mail: "
 
-#: cps/helper.py:638 cps/helper.py:642
+#: cps/helper.py:640 cps/helper.py:644
 msgid "Convert: "
 msgstr "Konvertiere: "
 
-#: cps/helper.py:640
+#: cps/helper.py:642
 msgid "Upload: "
 msgstr "Upload: "
 
-#: cps/helper.py:644
+#: cps/helper.py:646
 msgid "Unknown Task: "
 msgstr "Unbekannte Aufgabe: "
 
@@ -676,11 +694,6 @@ msgstr "Ein neues Update ist verfügbar. Klicke auf den Button unten, um auf Ver
 msgid "Click on the button below to update to the latest stable version."
 msgstr "Klicke auf den Button unten, um auf die letzte stabile Version zu aktualisieren."
 
-#: cps/uploader.py:213 cps/uploader.py:214 cps/uploader.py:218
-#: cps/uploader.py:222 cps/uploader.py:226
-msgid "not installed"
-msgstr "Nicht installiert"
-
 #: cps/web.py:460
 msgid "Recently Added Books"
 msgstr "Kürzlich hinzugefügte Bücher"
@@ -2301,4 +2314,3 @@ msgstr "Letzte Downloads"
 
 #~ msgid "Google OAuth Client Secret"
 #~ msgstr "Google OAuth Client-Secret"
-
diff --git a/messages.pot b/messages.pot
index e4bd017c..daaccd01 100644
--- a/messages.pot
+++ b/messages.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PROJECT VERSION\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2019-07-26 16:41+0200\n"
+"POT-Creation-Date: 2019-08-06 18:35+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,7 +17,16 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Babel 2.7.0\n"
 
-#: cps/about.py:70
+#: cps/about.py:40
+msgid "installed"
+msgstr ""
+
+#: cps/about.py:42 cps/uploader.py:213 cps/uploader.py:214 cps/uploader.py:218
+#: cps/uploader.py:222 cps/uploader.py:226
+msgid "not installed"
+msgstr ""
+
+#: cps/about.py:76
 msgid "Statistics"
 msgstr ""
 
@@ -275,125 +284,133 @@ msgstr ""
 msgid "Callback domain is not verified, please follow steps to verify domain in google developer console"
 msgstr ""
 
-#: cps/helper.py:79
+#: cps/helper.py:53
+msgid "Installed"
+msgstr ""
+
+#: cps/helper.py:56
+msgid "Not installed"
+msgstr ""
+
+#: cps/helper.py:81
 #, python-format
 msgid "%(format)s format not found for book id: %(book)d"
 msgstr ""
 
-#: cps/helper.py:91
+#: cps/helper.py:93
 #, python-format
 msgid "%(format)s not found on Google Drive: %(fn)s"
 msgstr ""
 
-#: cps/helper.py:98 cps/helper.py:206 cps/templates/detail.html:41
+#: cps/helper.py:100 cps/helper.py:208 cps/templates/detail.html:41
 #: cps/templates/detail.html:45
 msgid "Send to Kindle"
 msgstr ""
 
-#: cps/helper.py:99 cps/helper.py:117 cps/helper.py:208
+#: cps/helper.py:101 cps/helper.py:119 cps/helper.py:210
 msgid "This e-mail has been sent via Calibre-Web."
 msgstr ""
 
-#: cps/helper.py:110
+#: cps/helper.py:112
 #, python-format
 msgid "%(format)s not found: %(fn)s"
 msgstr ""
 
-#: cps/helper.py:115
+#: cps/helper.py:117
 msgid "Calibre-Web test e-mail"
 msgstr ""
 
-#: cps/helper.py:117
+#: cps/helper.py:119
 msgid "Test e-mail"
 msgstr ""
 
-#: cps/helper.py:132
+#: cps/helper.py:134
 msgid "Get Started with Calibre-Web"
 msgstr ""
 
-#: cps/helper.py:134
+#: cps/helper.py:136
 #, python-format
 msgid "Registration e-mail for user: %(name)s"
 msgstr ""
 
-#: cps/helper.py:148 cps/helper.py:150 cps/helper.py:152 cps/helper.py:160
-#: cps/helper.py:162 cps/helper.py:164
+#: cps/helper.py:150 cps/helper.py:152 cps/helper.py:154 cps/helper.py:162
+#: cps/helper.py:164 cps/helper.py:166
 #, python-format
 msgid "Send %(format)s to Kindle"
 msgstr ""
 
-#: cps/helper.py:168
+#: cps/helper.py:170
 #, python-format
 msgid "Convert %(orig)s to %(format)s and send to Kindle"
 msgstr ""
 
-#: cps/helper.py:208
+#: cps/helper.py:210
 #, python-format
 msgid "E-mail: %(book)s"
 msgstr ""
 
-#: cps/helper.py:210
+#: cps/helper.py:212
 msgid "The requested file could not be read. Maybe wrong permissions?"
 msgstr ""
 
-#: cps/helper.py:317
+#: cps/helper.py:319
 #, python-format
 msgid "Rename title from: '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr ""
 
-#: cps/helper.py:327
+#: cps/helper.py:329
 #, python-format
 msgid "Rename author from: '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr ""
 
-#: cps/helper.py:341
+#: cps/helper.py:343
 #, python-format
 msgid "Rename file in path '%(src)s' to '%(dest)s' failed with error: %(error)s"
 msgstr ""
 
-#: cps/helper.py:367 cps/helper.py:377 cps/helper.py:385
+#: cps/helper.py:369 cps/helper.py:379 cps/helper.py:387
 #, python-format
 msgid "File %(file)s not found on Google Drive"
 msgstr ""
 
-#: cps/helper.py:406
+#: cps/helper.py:408
 #, python-format
 msgid "Book path %(path)s not found on Google Drive"
 msgstr ""
 
-#: cps/helper.py:623
+#: cps/helper.py:625
 msgid "Waiting"
 msgstr ""
 
-#: cps/helper.py:625
+#: cps/helper.py:627
 msgid "Failed"
 msgstr ""
 
-#: cps/helper.py:627
+#: cps/helper.py:629
 msgid "Started"
 msgstr ""
 
-#: cps/helper.py:629
+#: cps/helper.py:631
 msgid "Finished"
 msgstr ""
 
-#: cps/helper.py:631
+#: cps/helper.py:633
 msgid "Unknown Status"
 msgstr ""
 
-#: cps/helper.py:636
+#: cps/helper.py:638
 msgid "E-mail: "
 msgstr ""
 
-#: cps/helper.py:638 cps/helper.py:642
+#: cps/helper.py:640 cps/helper.py:644
 msgid "Convert: "
 msgstr ""
 
-#: cps/helper.py:640
+#: cps/helper.py:642
 msgid "Upload: "
 msgstr ""
 
-#: cps/helper.py:644
+#: cps/helper.py:646
 msgid "Unknown Task: "
 msgstr ""
 
@@ -675,11 +692,6 @@ msgstr ""
 msgid "Click on the button below to update to the latest stable version."
 msgstr ""
 
-#: cps/uploader.py:213 cps/uploader.py:214 cps/uploader.py:218
-#: cps/uploader.py:222 cps/uploader.py:226
-msgid "not installed"
-msgstr ""
-
 #: cps/web.py:460
 msgid "Recently Added Books"
 msgstr ""