>>11094979In its most basic form :
A set of rules, biologically printed in our brain, that dictates the possibilies of language.
X is set of rules. Y, B, C are rules in the set that each contain other rules, with conditions, etc etc. You can also check his 4 levels of grammars, like automatas. Recursivity, generating rules with other rules within contexts, etc.
A lot of linguistics research is sadly deeply biased by the english language and writting/alphabetical systems in general.