Hello,
Yes, because all strings in source code aren't all defined with maccro _( wich allow translation, so cannot be translated.
1.2.8 should be the last 1.x version so this will not be solved in 1.x branch but it is in 2.x branch.
2.0.0rc5 is now far more translated, and cvs even more: 1315 strings
Thepolish