Fully SPOKEN video, STEP BY STEP EXPLAINED! How to change the language in GIMP / open GIMP in another language. After watching this GIMP tutorial, you’ll know how to open GIMP in any language that you want.
Change language in GIMP.
This is what you need for the .bat file. The instructions are in the video.
set lang=en
cd c:Program FilesGIMP-2.0bin
GIMP-2.6.exe