“Ἑβραϊστί”

Limited to Jn. 5:2; 19:13, 17, 20; 20:16; Rev. 9:11; 16:16,”Hebraisti” meant “In Hebrew” or “in the Hebrew language.”

The Exegetical Dictionary of the New Testament (1:370) suggested the references in John “probably” use this term “to provide historical details” and the book of Revelation contains this term “to intensify the strangeness of what is portrayed.”