u can copy ur languages to rofs2 of ur language also.
or just use rofs2 of ur language but remember to delete the 10202be9 directory as that will disable all the cenrep modification.
my CFW is based entirely FULLY on core.
its the core that is compatible with all language rofs2/rofs3...
That means I can grab with Navifirm the file RM-484_30.009_001_prd.language from my Country specific Firmware, unpack with Nokia Cooker, delete the private\10202BE9 directory, repack and then replace RM-484_30.009_001_prd.language that came with your firmware, correct?
If so it's damn easy to both add languages and input languages to your firmware