
Here is the mod archived as a ZIP file: Just extract the content of this archive in the following location (or where you have the game files - just do a search for rogame):
C:/Users/<your user>/Documents/My Games/RedOrchestra2/ROGame/Localization
So to clarify, inside the localization folder, extract the INT folder from the archive above. If you already have an INT folder, just rename it to something else.
For any questions, ask here.