- # Duplicate the "Waw" if prefixed
- if ( substr( $word, 0, 2 ) == "ו" && substr( $word, 0, 4 ) != "וו" ) {
+ # Duplicate the "Waw" if prefixed, but not if it is already double.
+ if ( substr( $word, 0, 2 ) === "ו" && substr( $word, 0, 4 ) !== "וו" ) {