TIL that "RPG" doesn't actually stand for "rocket propelled grenade" but instead is the abbreviation for the Russian "ruchnoy protivotankovy granatomyot" meaning "hand-held anti-tank grenade launcher" : r/todayilearned
This Is How an RPG Works | Military.com
How did the RPG-7 come to be known as 'rocket propelled grenade' when the letters stand for Russian words of different meaning? - Quora