I’m not a ML expert but I’m not sure a _language_ model makes sense here. A model like that… It’s basically going to be a ZIP code to salary coefficient mappin

I’m not a ML expert but I’m not sure a _language_ model makes sense here. A model like that… It’s basically going to be a ZIP code to salary coefficient mapping on steroids (with more parameters). The model by itself is probably (IANAL) legal if it can no longer produce any data points for individuals, but whenever using it for hiring purposes is legal or not certainly depends on inputs: e.g. feed it protected category (or a data that strongly correlates with one, e.g. name -> gender) and it most likely won’t fare well in court.