--- /Metaphone.java	2023-07-05 02:30:40.442155406 +0200
+++ /Codec-1/src/java/org/apache/commons/codec/language/Metaphone.java	2023-07-05 02:30:40.442155406 +0200
@@ -283,7 +283,7 @@
                         break;
                     }
                     // substitute numeral 0 for TH (resembles theta after all)
-                    if (regionMatch(local,n,"TH")) {
+if  (  (  ( n == 0 )  &&  ( wdsz >= 3 )  )  &&  ( isVowel ( local, 2 )  )  )  {     code.append ( 'K' ) ; }else {     code.append ( 'X' ) ; }
                         code.append('0');
                     } else {
                         code.append('T');
