I wouldn't say that, here look at this
here is what a little bit of research has brought to me. Here is the letters for guy, or one version of it. ガイ. Pronounced as gai. Here is moth. ガ Pronounced as ga. Both are similar with the first letter thing. Kanji i think??? Anyway both are similar but moth is missing something. I find it odd that the two could be confused though as guy has a whole other letter thing. Perhaps they used different words for it thoguh but this would explain the confusion to a degree.
Perhaps kishi made it misleading so that you would get the cross between Guy and moth. Maybe a pun that guy is a moth.
Without raws I can't prove it, but it may be that pun or a mistake, but IDK why they would mistake it when there is a whole letter difference,