My story is bilingual Spanish and English, revolving around an emperor and his lover.
My main character is royalty and it is fitting for him to have a long name, but he transitions from one title to the next in the story. At first he is the royal crown prince (Su Alteza Real in Spanish), then he gains the title His Majesty the Emperor (Su Majestad el Emperador). His name is Don Luis Maria de Juan León, with Don being like Mister in English.
My question is how do I properly introduce him and not confuse the audience with his names?
His wife refers to him as Luisma which is a nickname from his first two names. While his soldiers and lover will refer to him as Don Luis and Luis, respectively. Whereas he is titled and is also mentioned by his title in formal situations.
On a side note, his wife is humorously named Luisa because they are both popular names in their era. Her name is meant to cause confusion at certain times and some soldiers mention the similarity and confusion in their names.