diff --git a/projects/Time/21/org/joda/time/tz/DefaultNameProvider.java b/projects/Time/21/org/joda/time/tz/DefaultNameProvider.java
index 78413a2..89e6739 100644
--- a/projects/Time/21/org/joda/time/tz/DefaultNameProvider.java
+++ b/projects/Time/21/org/joda/time/tz/DefaultNameProvider.java
@@ -63,22 +63,32 @@ private synchronized String[] getNameSet(Locale locale, String id, String nameKe
         if (byNameKeyCache == null) {
             byIdCache.put(id, byNameKeyCache = createCache());
             
+            String[][] zoneStringsEn = DateTimeUtils.getDateFormatSymbols(Locale.ENGLISH).getZoneStrings();
+            String[] setEn = null;
+            for (String[] strings : zoneStringsEn) {
+              if (strings != null && strings.length == 5 && id.equals(strings[0])) {
+                setEn = strings;
+                break;
+              }
+            }
             String[][] zoneStringsLoc = DateTimeUtils.getDateFormatSymbols(locale).getZoneStrings();
             String[] setLoc = null;
             for (String[] strings : zoneStringsLoc) {
               if (strings != null && strings.length == 5 && id.equals(strings[0])) {
                 setLoc = strings;
+                break;
+              }
+            }
             
-              byNameKeyCache.put(setLoc[2], new String[] {setLoc[2], setLoc[1]});
+            if (setEn != null && setLoc != null) {
+              byNameKeyCache.put(setEn[2], new String[] {setLoc[2], setLoc[1]});
               // need to handle case where summer and winter have the same
               // abbreviation, such as EST in Australia [1716305]
               // we handle this by appending "-Summer", cf ZoneInfoCompiler
-              if (setLoc[2].equals(setLoc[4])) {
-                  byNameKeyCache.put(setLoc[4] + "-Summer", new String[] {setLoc[4], setLoc[3]});
+              if (setEn[2].equals(setEn[4])) {
+                  byNameKeyCache.put(setEn[4] + "-Summer", new String[] {setLoc[4], setLoc[3]});
               } else {
-                  byNameKeyCache.put(setLoc[4], new String[] {setLoc[4], setLoc[3]});
-              }
-                break;
+                  byNameKeyCache.put(setEn[4], new String[] {setLoc[4], setLoc[3]});
               }
             }
         }