That
linked post has instruction, twice for the translation and mods part. Shorter instructions than I
posted before for doing everything from scratch, and again for the game I posted that just needs the translation patch and mod pack install.
Put fix_TF.tpatch in the game folder with the exe, use apply patch in the main menu. Then when thats done do exactly the same with modpack.tpatch, and always do it in that order. Mods over top of the translation.
Edit - Quickly just tried apply patch with no patch in the folder to see what happens and it wouldn't do it.