Adam Łobatiuk wrote:
Open the TTX in Notepad or another text editor. The working languages are specified in tags between quotes "EN-US" or "FR" (I'm not sure about the correct language acronyms for French, could be FR-FR). Do a search and replace for those - it will be safer if you check the capitalization option and use the quotes as well. You might need to replace e.g "EN-US" with "XYZ", then "FR" with "EN-US" and "XYZ" with "FR" so that you don't replace what is already correct.
Any text editor will do for this task, provided that it can open and save files in Unicode (UTF-16 is the encoding that TTX files use)