Localisation updates from https://translatewiki.net.

i18n/ca.json

@@ -4,5 +4,6 @@
 			"Fitoschido"
 		]
 	},
-	"foreground-menutitle": "Menú"
+	"foreground-menutitle": "Menú",
+	"foreground-menunavback": "Enrere"
 }

i18n/pl.json

@@ -4,5 +4,6 @@
 			"Chrumps"
 		]
 	},
-	"foreground-menutitle": "Menu"
+	"foreground-menutitle": "Menu",
+	"foreground-menunavback": "Wstecz"
 }

i18n/ro.json

@@ -0,0 +1,10 @@
+{
+	"@metadata": {
+		"authors": [
+			"Strainu"
+		]
+	},
+	"skinname-foreground": "Prim plan",
+	"foreground-menutitle": "Meniu",
+	"foreground-menunavback": "Înapoi"
+}