Stephanus non est pater meus / vir felix... and so many real life possible phrases instead!!
they have Stephanus non est femina im pretty sure it should be Stephanus est not femina i could be wrong though Stephanus not is a woman Stephanus is not a woman
In the modern Romance languages that I'm familiar with, the "non" universally goes right before the verb it negates, never after. English is a Germanic language that puts the "not" right after the verb or auxiliary verb.