one more thing , after your post i downloaded xamp , and even with joomla issue with strict warning for php 3.5 lang file worked without issues. so il try to hunt down the actual server setting that is causing the error. on my wamp works of the bet also.
Maybe it happens with previous release of XAMPP 1.7.3.
Sorry for my attache files. Just I think somebody don't want to correct .ini files like me, they just replace language files. Maybe I'm not fully understand what really need, just I correct all lines which
which were marked in Language debug mode of Jomla 1.6.1 on Xampp 1.7.3