The center English spelling “god speid” inevitably gave way to our more modern spelling. Because of the evolution of the English language, “speid” (or sometimes spoed) doesn’t actually translate to our understanding of “fast.” The missionary carried the King James version with him where ever he went, plus a manuscript https://godspeed-hoodie56788.alltdesign.com/5-tips-about-godspeed-you-can-use-today-55050344