Wow... I am not very urge to even install these kind of 'tools' on the sites - but once I came upon problems with the languages on Joomla 1.7 I decided to use it.
And thankfully I did. Since it is really amazing job what it does - completely organized and error reported language structure for the whole site.. Finnally I saw where I had 'old' ini files and why they did not worked.. Thanks