Trying yo install 126.96.36.199 on Ubunto 14.04 server, can't change the installation language, when setting to Portugues(Brasil) the browser resets option to English.
Open your app/locale directory. The most probably you have only en_US folder. You need to download your localization and put it in that folder.
This localization is for magento 1.6 http://freegento.com/magento-extensions/Locale_Mage_community_pt_BR-188.8.131.52.2.tgz