I am working above the translation English to Turkish but I see that some of language locale files in main directory some of them in lib/pkp/locale directory. Sometimes the language problem cannot be detected in which folder the file. Can there be a solution to this problem? at least all of the language files can be collected in one folder in these two folders?
Well, you have to translate files in both directories. But if you want you can try using the translation plugin within OJS. In the OJS 3 it is quite nice and easy to use.