localized data onversion error messages

locale/lang-de.js

@@ -1998,6 +1998,8 @@ SnapTranslator.dict.de = {
         'Pr\u00e4dikat',
     'sprite':
         'Objekt',
+    'ring':
+        'Ring',
     'nothing':
         'nichts',
 
@@ -2115,5 +2117,9 @@ SnapTranslator.dict.de = {
     'Inside a custom block':
         'In einem benutzerdefinierten Block',
     'The error occured at':
-        'Der Fehler passierte bei'
+        'Der Fehler passierte bei',
+    'continuations cannot be forked':
+        'Continuations können nicht separat gestartet werden',
+    'unable to convert to':
+        'Kann die Liste nicht umwandeln in'
 };

src/threads.js

@@ -1457,7 +1457,12 @@ Process.prototype.initializeFor = function (context, args) {
         );
     }
     if (!(context instanceof Context)) {
-        throw new Error('expecting a ring but getting ' + context);
+        throw new Error(
+            localize('expecting a') + ' ' +
+            localize('ring') + ' ' +
+            localize('but getting a') + ' ' +
+            localize(this.reportTypeOf(context))
+        );
     }
 
     var outer = new Context(null, null, context.outerContext),
@@ -2096,19 +2101,25 @@ Process.prototype.reportListAttribute = function (choice, list) {
         if (list.canBeTXT()) {
             return list.asTXT();
         }
-        throw new Error('unable to convert to lines');
+        throw new Error(
+            localize('unable to convert to') + ' ' + localize('lines')
+        );
     case 'csv':
         this.assertType(list, 'list');
         if (list.canBeCSV()) {
             return list.asCSV();
         }
-        throw new Error('unable to convert to CSV');
+        throw new Error(
+            localize('unable to convert to') + ' ' + localize('CSV')
+        );
     case 'json':
         this.assertType(list, 'list');
         if (list.canBeJSON()) {
             return list.asJSON();
         }
-        throw new Error('unable to convert to JSON');
+        throw new Error(
+            localize('unable to convert to') + ' ' + localize('JSON')
+        );
     default:
         return 0;
     }