"Religio" is not an English word. If you use it in regard to the English language, you need to define it. If you define it, other people may or may not accept your definition of it. If enough people accept your definition of it and start to use it, it might get into the English dictionaries as an English word. Right now, it doesn't have any English meaning.
Well the etymology is latin if you want to understand the word you should know where the word is coming from.
Do you agree on the methodology?
Best regards.
Right at the moment, I am not interested in understanding the word. Thus, I am not sure if I can agree on the methodology.