don't require english

lang.json

 {
 	"default": "de",
 	"supported": [
-		"de",
-		"en"
+		"de"
 	],
 	"de": {
 		"langname": "Deutsch",
@@ -80,7 +79,7 @@
 		"page": {
 			"published_prefix": "Created: ",
 			"published_suffix": " | ",
-			"modified_prefix": "Last Change: ",
+			"modified_prefix": "Last change: ",
 			"modified_suffix": "",
 			"authors_prefix": "Authors: ",
 			"authors_suffix": "",