make error msg part of html (allowing translation) instead of hardcoded text

htroot/Translator_p.html

@@ -17,7 +17,7 @@
         <legend>
           <label>UI Translation</label>
         </legend>
-        <p>Target Language: <b>#[targetlang]#</b></p><p class="error">#[errmsg]#</p>
+        <p>Target Language: <b>#[targetlang]#</b></p> #(errmsg)#::<p class="error">activate a different language <a href='ConfigBasic.html'>here</a></p>#(/errmsg)#
         <label for="sourcefile">Source File</label>
         <select name="sourcefile" onchange="submit();">
           #{filelist}#

htroot/Translator_p.java

@@ -41,10 +41,10 @@ public class Translator_p {
             String langcfg = sb.getConfig("locale.language", "default");
             prop.put("targetlang", langcfg);
             if ("default".equals(langcfg) || "browser".equals(langcfg)) {
-                prop.put("errmsg", "activate a different language");
+                prop.put("errmsg", 1); // msg: activate diff lng
                 return prop;
             } else {
-                prop.put("errmsg", "");
+                prop.put("errmsg", 0);
             }
 
             File lngfile = new File(sb.getAppPath("locale.source", "locales"), langcfg + ".lng");

locales/master.lng.xlf

@@ -8638,6 +8638,9 @@
     <trans-unit id="7752d013" xml:space="preserve" approved="no" translate="yes">
        <source>Target Language:</source>
     </trans-unit>
+    <trans-unit id="67dd468b" xml:space="preserve" approved="no" translate="yes">
+        <source>activate a different language</source>
+    </trans-unit>
     <trans-unit id="5ad17261" xml:space="preserve" approved="no" translate="yes">
        <source>Source File</source>
     </trans-unit>