the more the merrier

English

First recorded in the 14th-century poem Pearl, line 850. The phrase contains an instance of the comparative correlative use of the.

the more the merrier

Something is more fun with more people.
A greater amount of something is better.
Used to welcome another person into a group activity or encourage them to join in, suggesting that they will be easily accommodated.

it is more fun with more people

Catalan: com més serem, més riurem (ca)
Chinese:
Mandarin: 多多益善 (zh) (duō duō yì shàn), 越多越好 (yuè duō yuè hǎo)
Danish: desto flere, desto sjovere
Dutch: hoe meer zielen, hoe meer vreugd
Estonian: mida rohkem, seda uhkem
Finnish: enempi parempi
French: plus on est de fous, plus on rit (fr)
German: je mehr, desto besser
Greek: όσο περισσότεροι, τόσο καλύτερα (óso perissóteroi, tóso kalýtera)
Hungarian: (we…) minél többen vagyunk, annál jobban érezzük magunkat, (they…) minél többen vannak, annál jobban érzik magukat
Indonesian: makin banyak makin meriah, semakin banyak semakin meriah
Italian: più siamo meglio è
Japanese: 多多益益弁ず (ja) (tata masumasu benzu)
Korean: 다다익선(多多益善) (ko) (dadaikseon)
Norwegian: jo flere, desto bedre, jo flere, jo bedre
Polish: w kupie raźniej
Portuguese: quanto mais, melhor
Russian: (literal) чем бо́льше, тем веселе́е (čem bólʹše, tem veseléje), в тесноте́, да не в оби́де (ru) (v tesnoté, da ne v obíde), чем бо́льше, тем лу́чше (čem bólʹše, tem lúčše)
Spanish: cuantos más, mejor
Swedish: ju fler desto roligare, ju fler desto bättre
Vietnamese: càng đông càng vui
Walloon: pus k' on est d' sots, pus k' on reye (wa), pus çk' on-z est d' sots, pus çk' on reye (wa)

a greater amount of something is better

“the more the merrier”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.