You can view a list of current translations and translations-in-progress here:http://pkp.sfu.ca/ojs-languages
There is also a page with instructions on translating OJS here: http://pkp.sfu.ca/ojs-translating
We're looking at expanding our translating documentation shortly, but in the meantime that's what we have.
There is also a translation plugin that ships with OJS: if you can log in as a Journal Manager, you can find it under User Home -> System Plugins. We don't currently have any instructions on using it, but again, we will have some shortly. You can't currently use the translation plugin to create a new translation from scratch, but once you have even a partial translation ready to go, you can load it into the system and use the plugin to check what's missing.
I would also like to ask that if you do make any progress on translating OJS into Bosnian, to please keep us posted, and to share your translation with us as well. We aim to provide OJS in as many languages as possible, and greatly appreciate any help in that regard.
If you have any other questions, please let me know.