Smb4K 1.0.x fixes this problem. It comes with the translations of the KDE
project and the build system correctly installs all translations.
A fix to the 0.10.x branch is not planned. However, either renaming
smb4k/po/pt/pt.po to smb4k/po/pt/smb4k.po in the source package or renaming
the pt.mo file to smb4k.mo during installation (as the reporter already stated)
will provide the portuguese users with the translation.
Since we moved to Sourceforge due to the unclear future of BerliOS some months
ago, the source code of the newest stable versions can be found at
pkg-kde-extras mailing list