Add missing fields to locales (part 2)

Updated ja.json    (Japanese)
Updated nb-NO.json (Norwegian Bokmål)
Updated nl.json    (Dutch)
Updated pl.json    (Polish)
Updated pt-BR.json (Portuguese, Brazil)
Updated ro.json    (Romanian)
Updated ru.json    (Russian)

locales/pl.json

@@ -333,5 +333,32 @@
     "Videos": "Filmy",
     "Playlists": "Playlisty",
     "Community": "Społeczność",
+    "relevance": "",
+    "rating": "",
+    "date": "",
+    "views": "",
+    "content_type": "",
+    "duration": "",
+    "features": "",
+    "sort": "",
+    "hour": "",
+    "today": "",
+    "week": "",
+    "month": "",
+    "year": "",
+    "video": "",
+    "channel": "",
+    "playlist": "",
+    "movie": "",
+    "show": "",
+    "hd": "",
+    "subtitles": "",
+    "creative_commons": "",
+    "3d": "",
+    "live": "",
+    "4k": "",
+    "location": "",
+    "hdr": "",
+    "filter": "",
     "Current version: ": "Aktualna wersja: "
 }