update localization support

Author: thomas-kl1

README.md

@@ -89,7 +89,7 @@ Languages:
 - [x] en_US ; English
 - [x] de_DE ; German
 - [x] fr_FR ; French (partial)
-- [ ] nl_NL ; Dutch (partial)
+- [x] nl_NL ; Dutch (partial)
 - [ ] it_IT ; Italian (partial)
 
 ## Settings