Totally agreed, my comment was just to add meaning in case others also wondered , not a criticism. Gotta love trans-language words. My friends used to say “go hands” whenever it was time to vamanos.
(And -monos is etymologically very transparent - it's just the first person plural ending -mos, familiar to everybody, with the first person plural reflexive pronoun nos suffixed onto it and eliding the -s of -mos.)