I have fixed it with:

paul@jacko:~/gpc1/gcc-3.4.6/gcc$ diff -u ../../gpc-master/p/doc/hr/gpc.texi  p/doc/hr/gpc.texi

--- ../../gpc-master/p/doc/hr/gpc.texi    2017-01-06 17:56:28.000000000 -0500

+++ p/doc/hr/gpc.texi    2021-03-06 07:33:22.993693828 -0500

@@ -1,9 +1,9 @@

 \input texinfo

+@documentencoding iso-8859-2

 @setfilename gpc-hr.info

 @settitle GNU Pascal priru�nik.

 @c We use Latin 2 charset for hr_HR language.

 @set charset iso-8859-2

-@documentencoding iso-8859-2

 

 @c Copyright (C) 1996-2006 Free Software Foundation, Inc.

 @c This file is part of the GPC Manual.

paul@jacko:~/gpc1/gcc-3.4.6/gcc$

paul@jacko:~/gpc1/gcc-3.4.6/gcc$ diff -u ../../gpc-master/p/doc/es/gpcs.texi  p/doc/es/gpcs.texi

--- ../../gpc-master/p/doc/es/gpcs.texi    2017-01-06 17:56:28.000000000 -0500

+++ p/doc/es/gpcs.texi    2021-03-06 07:58:40.895455259 -0500

@@ -1,7 +1,7 @@

 \input texinfo

 @setfilename gpcs.info

-@settitle Est�ndar de Codificaci�n GNU Pascal

 @documentencoding iso-8859-1

+@settitle Est�ndar de Codificaci�n GNU Pascal

 

 @c Copyright (C) 2001-2006 Free Software Foundation, Inc.

 @c

paul@jacko:~/gpc1/gcc-3.4.6/gcc$