The 84th Line, created in 1684 was known by the Battle of Graz. On the 25th and 26th June 1809, two battalions of the 84th defended a church cemetery for many hours against thousands of Austrian soldiers. In the end, the regiment broke through and escaped their enemies. In honor of the regiment's outstanding bravery on this occasion, the 84th was allowed to add the words "UN CONTRE DIX" (One Against Ten) on their colors.
Regiment numbers don't translate. You guys are the 84e, not the 84th. Even while using the english language, you still are '84e' as the regiment is a French regiment. Just because you mention them through a text written in English, you still wouldn't call the 8lr the 8th or the 75e, the 75th right?
With that being said, I wish you a warm good luck. Hope you guys are successful.