In English, the word "governor" ends with the letters -or.
I'm sorry about this, but in English, words for "a person who does X" or "a thing that does X" sometimes end in -er, sometimes send in -or, and rarely--but sometimes--can be correctly spelled both ways.
governor, raptor, councillor, counselor, indicator, calculator
computer, typewriter, murderer, comptroller, maker, broadcaster, announcer, singer, songwriter
both spellings acceptable: