Some yukkuri believe that whoever kills a yukkuri can't take it easy.
Specifically, this ko seemed to believe that the human shouldn't be able to take it easy (because the ko thought that the human killed yukkuri) but looked very much like they were taking it easy.
I think it's more of a misunderstanding rather than an author/translator error.
MarichaCan onwy be shtealthy...
Check thisMaricha can onwy be shcared...
Check thisWill beat mishter human!It'sh shtrange!!Can'ch chake it eajy, [mishter human] chakes it eajy...!
Actually I'm not 100% sureEven chough mishter humanWere dwone by a mishter human that can'ch chake it eajy...!Little shishtersh...Big shishtersh...Yuchi!Yuyu?!Will beat mishter human no je!Maricha