Update german translation.

Based on FS#12735 by Kaspar Rothenfußer with some modifications by me to be in
line with terms already used in the translation.

Change-Id: Ia1ba59bd00d61f0fd27bd496a116143e4b83b420

apps/lang/deutsch.lang

@@ -12311,15 +12311,15 @@
   user: core
   <source>
     *: none
-    gigabeats,mpiohd200,mpiohd300,sansafuzeplus: "3-D Enhancement"
+    gigabeats,mpiohd200,mpiohd300,sansafuzeplus,creativezenxfi2,creativezenxfi3: "3-D Enhancement"
   </source>
   <dest>
     *: none
-    gigabeats,mpiohd200,mpiohd300,sansafuzeplus: "Raumklangverbesserung"
+    gigabeats,mpiohd200,mpiohd300,sansafuzeplus,creativezenxfi2,creativezenxfi3: "Raumklangverbesserung"
   </dest>
   <voice>
     *: none
-    gigabeats,mpiohd200,mpiohd300,sansafuzeplus: "Raumklangverbesserung"
+    gigabeats,mpiohd200,mpiohd300,sansafuzeplus,creativezenxfi2,creativezenxfi3: "Raumklangverbesserung"
   </voice>
 </phrase>
 <phrase>
@@ -12887,16 +12887,16 @@
 </phrase>
 <phrase>
   id: LANG_SLEEP_TIMER_DURATION
-  desc: default sleep timer duration in minutes (unused in UI)
+  desc: default sleep timer duration in minutes
   user: core
   <source>
     *: "Default Sleep Timer Duration"
   </source>
   <dest>
-    *: "Standard Einschlaftimer"
+    *: "Standarddauer Einschlaftimer"
   </dest>
   <voice>
-    *: "Standard Einschlafzeit"
+    *: "Standarddauer Einschlafzeit"
   </voice>
 </phrase>
 <phrase>
@@ -12927,3 +12927,124 @@
     *: "Einschlafzeit automatisch starten"
   </voice>
 </phrase>
+<phrase>
+  id: LANG_SELECT_FOLDER
+  desc: in settings_menu
+  user: core
+  <source>
+    *: "Select one or more directories"
+  </source>
+  <dest>
+    *: "Eines oder mehrerer Verzeichnisse auswählen"
+  </dest>
+  <voice>
+    *: "Eines oder mehrerer Verzeichnisse auswählen"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_CROSSFEED_MEIER
+  desc: in sound settings
+  user: core
+  <source>
+    *: none
+    swcodec: "Simple (Meier)"
+  </source>
+  <dest>
+    *: none
+    swcodec: "Einfach (Meier)"
+  </dest>
+  <voice>
+    *: none
+    swcodec: "Einfach"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_SLEEP_TIMER_START_CURRENT
+  desc: shown when a sleep timer isn't running
+  user: core
+  <source>
+    *: "Start Sleep Timer"
+  </source>
+  <dest>
+    *: "Einschlaftimer starten"
+  </dest>
+  <voice>
+    *: "Einschlaftimer starten"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_SELECT_DATABASE_DIRS
+  desc: in settings_menu
+  user: core
+  <source>
+    *: "Select directories to scan"
+  </source>
+  <dest>
+    *: "Verzeichnisse auswählen"
+  </dest>
+  <voice>
+    *: "Verzeichnisse zum Durchsuchen auswählen"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_CODEPAGE_WESTERN_EUROPEAN
+  desc: in codepage setting menu
+  user: core
+  <source>
+    *: "Western European (CP1252)"
+  </source>
+  <dest>
+    *: "Westeuropäisch (CP1252)"
+  </dest>
+  <voice>
+    *: "Westeuropäisch"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_CROSSFEED_CUSTOM
+  desc: in sound settings
+  user: core
+  <source>
+    *: none
+    swcodec: "Custom"
+  </source>
+  <dest>
+    *: none
+    swcodec: "Manuell"
+  </dest>
+  <voice>
+    *: none
+    swcodec: "Manuell"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_USE_SHORTCUTS_INSTEAD_OF_QS
+  desc: in settings_menu.
+  user: core
+  <source>
+    *: none
+    quickscreen: "Use Shortcuts Menu Instead of Quick Screen"
+  </source>
+  <dest>
+    *: none
+    quickscreen: "Verknüpfungsmenü statt Schnelleinstellung verwenden"
+  </dest>
+  <voice>
+    *: none
+    quickscreen: "Verknüpfungsmenü statt Schnelleinstellung verwenden"
+  </voice>
+</phrase>
+<phrase>
+  id: LANG_CONSTRAIN_NEXT_FOLDER
+  desc: in settings_menu. Whether LANG_NEXT_FOLDER should be constrained to directories within LANG_SET_AS_START_DIR
+  user: core
+  <source>
+    *: "Constrain Auto-Change"
+  </source>
+  <dest>
+    *: "Beschränke autom. Verzeichniswechsel"
+  </dest>
+  <voice>
+    *: "Beschränke automatischen Verzeichniswechsel"
+  </voice>
+</phrase>