How would apple know that my app contains my own custom interpreter? It's just a program that takes raw strings (whatever the source may be) and behaves in some

How would apple know that my app contains my own custom interpreter? It's just a program that takes raw strings (whatever the source may be) and behaves in some arbitrary way according to the string. How can this be detected automatically? Looking for a certain interpreter patterns (e.g. A big switch)? I imagine this would be extremely fragile to false positives and also code can be automatically obfuscated arbitrarily (convert the switch into if-else trees and spread them across subroutines).