For that purpose, at first, you should uninstall base locale rpm:
[root@kathy tomcat4]# rpm -q psa-locale-base-en-US
psa-locale-base-en-US-7.5.4-fc2.build75050506.13
[root@kathy tomcat4]# rpm -e psa-locale-base-en-US-7.5.4-fc2.build75050506.13
After that you need to install portugesse locale with 'rpm -Uvh locale_rpm' command.
Further, make sure the following:
'locales' table contains such line:
mysql> select * from locales;
+-------+--------+
| id | active |
+-------+--------+
| "package" | true |
+----------------+
also 'misc' table:
mysql> select * from misc where param='admin_locale' or param='def_locale';
+--------------+-------+
| param | val |
+--------------+-------+
| admin_locale | "package" |
| def_locale | "package" |
+--------------+-------+
where I put package you must put the id of your portugesse package (I dont know ). Mine is spanish (es-ES).