diff --git a/lang/nl.json b/lang/nl.json
index 6046173..564eb9a 100644
--- a/lang/nl.json
+++ b/lang/nl.json
@@ -52,41 +52,41 @@
     "category:places_geo": "Plaatsen",
     "category:playgrounds": "Speeltuin",
     "category:post": "Post",
-    "category:power_routes": "",
-    "category:pt": "",
-    "category:pt:routes": "",
+    "category:power_routes": "Elektriciteitsleidingen",
+    "category:pt": "Openbaar vervoer kaart",
+    "category:pt:routes": "Routes",
     "category:pt:stops": "Haltes en Stations",
     "category:pt_amenities": "Voorzieningen",
     "category:public": "Openbare diensten",
     "category:railway": "Spoorwegen",
-    "category:railway-electrification": "",
-    "category:railway-infrastructure": "",
-    "category:railway-maxspeed": "",
-    "category:railway-routes": "",
+    "category:railway-electrification": "Spoorwegelektrificatie",
+    "category:railway-infrastructure": "Spoorweginfrastructuur",
+    "category:railway-maxspeed": "Spoorweg snelheidslimiet",
+    "category:railway-routes": "Spoorwegroutes",
     "category:religion": "Religie",
-    "category:renewables": "",
+    "category:renewables": "Hernieuwbare energie",
     "category:residential": "Woongebieden",
     "category:resources": "Grondstoffenwinning",
     "category:services": "Dienstverlening",
     "category:shop": "Winkelen",
-    "category:special": "",
+    "category:special": "Speciaal",
     "category:sport": "Sport",
-    "category:swimming_bathing": "",
+    "category:swimming_bathing": "Zwemmen en baden",
     "category:tourism_attractions": "Toerisme",
     "category:tourism_services": "Toerisme",
     "category:transport": "Vervoer",
     "category:transport_alternative": "Alternatief (Fiets, Wandel, ...)",
     "category:transport_car": "Gemotoriseerd individueel verkeer",
-    "category:transport_cycle": "",
+    "category:transport_cycle": "Fietsen",
     "category:transport_pt": "Openbaar vervoer",
-    "category:transport_walk": "",
-    "category:walk_amenities": "",
+    "category:transport_walk": "Wandelen",
+    "category:walk_amenities": "Voorzieningen",
     "category:waste": "Afvalverwijdering",
-    "category:water": "",
-    "category:wikipedia": "",
+    "category:water": "Oppervlaktewater",
+    "category:wikipedia": "Wikipedia",
     "category:works": "Fabrieken",
-    "category:xmas": "",
-    "date format not understood": "",
-    "outdated feature": "",
-    "xmas:outdated-warning": ""
+    "category:xmas": "Kerstmis",
+    "date format not understood": "Datumformaat onbekend",
+    "outdated feature": "Achterhaalde informatie",
+    "xmas:outdated-warning": "Object werd niet geactualiseerd voor het huidige seizoen! Controleer en zet de tag 'xmas:lastcheck' op de huidige datum alstublieft."
 }