“Jesus spoke in Aramaic, that’s what cephas is.”
No doubt He spoke Aramaic. Likely Greek, the trade language and likely Hebrew.
More I mportantly, the Holy Spirit inspired the NT in Greek, and chose those words we see recorded in the manuscripts.
And chose the words we see? You mean like cephas which is Aramaic.?
Also like you said after all of those years of the trade language and the scriptures before that being wrote in Greek
it is strange about one word being in Aramaic.
I have no doubt it was the act of the holy spirit saying to
the religious leaders, oh no you don’t, not so easy any way.
Even back then there were most likely ambitious people trying
to take the place of Peter and the other apostles.