diff --git a/app/src/main/res/values-nl/strings.xml b/app/src/main/res/values-nl/strings.xml
index fa893c21807618d63a41da19e7b0e7a57907c05d..e521c1026f6144d5b678c8a114f442dba93d55d4 100644
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@@ -41,6 +41,7 @@
   <string name="navigation_drawer_news_updates">Nieuws &amp; updates</string>
   <string name="navigation_drawer_external_links">Externe links</string>
   <string name="navigation_drawer_website">Website</string>
+  <string name="navigation_drawer_manual">Manueel</string>
   <string name="navigation_drawer_faq">FAQ</string>
   <string name="navigation_drawer_forums">Help / Forums</string>
   <string name="navigation_drawer_donate">Doneren</string>
@@ -88,6 +89,7 @@
   <string name="account_carddav">CardDAV</string>
   <string name="account_caldav">CalDAV</string>
   <string name="account_webcal">Webcal</string>
+  <string name="account_calendar">calendar</string>
   <string name="account_refresh_address_book_list">Adresboeken vernieuwen</string>
   <string name="account_create_new_address_book">Maak een nieuw adresboek</string>
   <string name="account_refresh_calendar_list">Agenda\'s vernieuwen</string>
@@ -107,6 +109,7 @@
   <string name="login_user_name">Gebruikersnaam</string>
   <string name="login_user_name_required">Gebruikersnaam vereist</string>
   <string name="login_base_url">Basis URL</string>
+  <string name="login_select_certificate">Certificaat selecteren</string>
   <string name="login_login">Login</string>
   <string name="login_back">Terug</string>
   <string name="login_create_account">Maak een account</string>
@@ -127,6 +130,7 @@
   <string name="settings_password">Wachtwoord</string>
   <string name="settings_password_summary">Gebruik het zelfde wachtwoord als op de server.</string>
   <string name="settings_enter_password">Wachtwoord invoeren:</string>
+  <string name="settings_certificate_alias">Client certificaat alias </string>
   <string name="settings_sync">Synchronisatie</string>
   <string name="settings_sync_interval_contacts">Contacten verversen</string>
   <string name="settings_sync_summary_manually">Alleen handmatig</string>
@@ -194,6 +198,8 @@
   <string name="sync_contacts_read_only_address_book">Alleen-lezen adresboek</string>
   <string name="sync_error_permissions">DAVdroid rechten</string>
   <string name="sync_error_permissions_text">Aanvullende rechten vereist</string>
+  <string name="sync_error_retry">Opnieuw</string>
+  <string name="sync_error_view_item">Bekijk item</string>
   <!--cert4android-->
   <string name="certificate_notification_connection_security">DAVdroid: Verbinding beveiliging</string>
   <string name="trust_certificate_unknown_certificate_found">Davdroid is benaderd door een onbekend certificaat. Vertrouwd u dit?</string>