If you use Shadow Movement to sneak into houses and a pegasus team to pull the flying sleigh... yes, in this world, it's possible to become Santa Claus! But... the Christmas tradition doesn't even exist in this world. When Rimuru tries to explain it in detail to the people of Tempest, they end up summarizing it as a "party." The Christmas cake and presents are ready, and most importantly, Kaijin and the other Dwarves create gorgeous decorations that bring the Christmas mood to Tempest. On top of that, Eren and the children treat everyone in town with their heavenly singing.
They're both great! I can tell 
you're students of Shuna's!
!كلاهما لذيذان! من الواضح أنّكما تلميذا شونا
Die sind beide super!
Ihr habt echt gut von Shuna gelernt.
Está todo muy rico.
Son buenos discípulos.
Está todo muy rico.
Sois buenos discípulos.
C’est délicieux !
Vous méritez d’être ses élèves !
Che bontà! Si sente che siete gli allievi di Shuna!
Os dois estão deliciosos!
Ótimo trabalho, alunos da Shuna!
Тут всё такое вкусное!
Сразу видно, ученики Сюны!