Lalwendė, you have a knack for asking probing questions about yourself that only you can really answer; nonetheless very intriguing, for all that. 
 
"Backstory" was just a spur of the moment whim, and I don't like it.
From my Webster's:
	Quote:
	
	
		| conceit: an elaborate or strained metaphor (other definitions don't fit our context) 
 notion: (1) an inclusive general concept (2) an individual's conception or impression of something known, experienced, or imagined (other definitions don't fit our context)
 
 innovation: the introduction of something new; a new idea, method, or device
 
 device: something devised or contrived ... something fanciful, elaborate, or intricate in design; something in a literary work designed to achieve a particular artistic effect
 | 
	
 There you have it.  Whereas conceit, notion, and innovation do communicate something about it, I think the best word is perhaps the simplest: 
The Translator Device.  If I could change the thread title, I would.