diff --git a/src/main/java/org/jitsi/dnssec/R.java b/src/main/java/org/jitsi/dnssec/R.java
index d67acb5..03e9e82 100644
--- a/src/main/java/org/jitsi/dnssec/R.java
+++ b/src/main/java/org/jitsi/dnssec/R.java
@@ -11,24 +11,49 @@
 package org.jitsi.dnssec;
 
 import java.text.MessageFormat;
+import java.util.MissingResourceException;
 import java.util.ResourceBundle;
 
 /**
  * Utility class to retrieve messages from {@link ResourceBundle}s.
  */
 public final class R {
-    private static ResourceBundle rb = ResourceBundle.getBundle("messages");
+
+    private static ResourceBundle rb = null;
 
     private R() {
     }
 
+    /**
+     * Programmatically set the ResourceBundle to be used.
+     *
+     * @param resourceBundle ResourceBundle to Be Used.
+     */
+    public static void setBundle(ResourceBundle resourceBundle) {
+        R.rb = resourceBundle;
+    }
+
     /**
      * Gets a translated message.
-     * @param key The message key to retrieve.
+     *
+     * @param key    The message key to retrieve.
      * @param values The values that fill placeholders in the message.
      * @return The formatted message.
      */
     public static String get(String key, Object... values) {
-        return MessageFormat.format(rb.getString(key), values);
+        try {
+            if (R.rb == null) {
+                 rb = ResourceBundle.getBundle("messages");
+            }
+            return MessageFormat.format(rb.getString(key), values);
+        }
+        catch (MissingResourceException e) {
+            StringBuilder sb = new StringBuilder(key);
+            for (Object val : values) {
+                sb.append(":");
+                sb.append(val.toString());
+            }
+            return sb.toString();
+        }
     }
 }