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diff --git a/user_manual/locale/source/.doctrees/whats_new.doctree b/user_manual/locale/source/.doctrees/whats_new.doctree
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diff --git a/user_manual/locale/source/pim/sync_thunderbird.pot b/user_manual/locale/source/pim/sync_thunderbird.pot
index 40d93d73f..0da60034c 100644
--- a/user_manual/locale/source/pim/sync_thunderbird.pot
+++ b/user_manual/locale/source/pim/sync_thunderbird.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Nextcloud latest User Manual latest\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-05-03 13:19+0000\n"
+"POT-Creation-Date: 2021-05-07 13:47+0000\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"
@@ -37,15 +37,15 @@ msgid "The `Lightning calendar <https://addons.thunderbird.net/en/thunderbird/ad
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:14
-msgid "`TBSync <https://addons.thunderbird.net/en/thunderbird/addon/tbsync/>`_."
+msgid "`TbSync <https://addons.thunderbird.net/en/thunderbird/addon/tbsync/>`_."
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:15
-msgid "The `TBSync provider for CalDAV and CardDAV <https://addons.thunderbird.net/en/thunderbird/addon/dav-4-tbsync/>`_."
+msgid "The `TbSync provider for CalDAV and CardDAV <https://addons.thunderbird.net/en/thunderbird/addon/dav-4-tbsync/>`_."
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:17
-msgid "When they are installed, if you are on Windows, go to **Extras**/**Synchronisation settings (TBSync)** or **Edit/Synchronisation settings (TBSync)** if on Linux, and then:"
+msgid "When they are installed, if you are on Windows, go to **Extras**/**Synchronisation settings (TbSync)** or **Edit/Synchronisation settings (TbSync)** if on Linux, and then:"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:19
@@ -61,11 +61,11 @@ msgid "Enter an **account name**, which you can freely choose, **user name**, **
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:22
-msgid "In the next window, TBSync should have autodiscovered the CalDAV and CardDAV addresses. When it has, click **Finish**"
+msgid "In the next window, TbSync should have autodiscovered the CalDAV and CardDAV addresses. When it has, click **Finish**"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:23
-msgid "Now check the box **Enable and synchronize this account**. TBSync will discover all address books and calenders your account has access to on the server"
+msgid "Now check the box **Enable and synchronize this account**. TbSync will discover all address books and calenders your account has access to on the server"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:24
@@ -73,7 +73,7 @@ msgid "Check the box next to each calender and address book you want to have syn
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:25
-msgid "After the first successful synchronisation is complete, you can close the window. Henceforth, TBSync will do the work for you. You are done and can skip the next sections (unless you need a more advanced address book)"
+msgid "After the first successful synchronisation is complete, you can close the window. Henceforth, TbSync will do the work for you. You are done and can skip the next sections (unless you need a more advanced address book)"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:29
@@ -81,7 +81,7 @@ msgid "Alternative: Using the CardBook add-on (Contacts only)"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:30
-msgid "`CardBook <https://addons.thunderbird.net/en/thunderbird/addon/cardbook/>`_ is an advanced alternative to Thunderbird's address book, which supports CardDAV. You can have TBSync and CardBook installed in parallel."
+msgid "`CardBook <https://addons.thunderbird.net/en/thunderbird/addon/cardbook/>`_ is an advanced alternative to Thunderbird's address book, which supports CardDAV. You can have TbSync and CardBook installed in parallel."
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:32
@@ -117,7 +117,7 @@ msgid "This method is only needed if you don't want to install TBSync."
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:55
-msgid "Go to your Nextcloud Calendar and click on the 3 dotted menu for the calendar that you want to synchronize which will display and URL that looks something like this:"
+msgid "Go to your Nextcloud Calendar and click on the 3 dotted menu for the calendar that you want to synchronize which will display an URL that looks something like this:"
 msgstr ""
 
 #: ../../pim/sync_thunderbird.rst:57