Was planning to use the same dataset too in my Python module: https://github.com/scaleway/postal-address

And thanks @bojanz for asking Google about their data's license! :)

Haven't looked in details at your addressing PHP module or even Libpostal, but I feel like there should be some ways to deduplicate efforts and converge all datasets. Both for testing and i18n/l10n.

In the mean time, OpenCageData's address-formatting language-neutral YAML structure seems quite nice.