What "optional credits" in FitGirl selective download repacks?

When creating your own repack, you can compress fgoptionalturkishbin separately with LZMA2 (ultra settings) and include a restore_turkish.bat script to copy files to the correct location post-install.

If you want to play the game in Turkish, follow these steps to ensure it installs correctly: : Place the fg-optional-turkish.bin file in the same folder and the mandatory Installation

Elian stared. His Turkish was rusty, mostly picked up from bad subtitles and holiday phrases, but he knew enough.

Without more specific information on what "FG Option Turkish Bin Repack" entails, it's difficult to provide a detailed analysis. However, based on the general concepts: