Is there some kind of English word that describes a person by its gender but you don't want to say the gender of the person? This may sound confusing, so let me explain it!
In Sweden we got a word called "Hen", which basiaclly means he or she. It could be either of them, but the writer doesn't want to tell the reader what, maybe because of various reasons (for example that the gender of the person doesn't matter etc, etc...)
Here's an example that I will write in Swedish then translate it to English.
"Hen öppnade dörren med en nyckel"
"... opened the door with a key"
Also when you search for a job in some companies, they want you to define yourself as an individual with han, hon or hen.
Han = He
Hon = She
Hen = ?
Tell me if you still don't understand and I'll try to explain it for you