I expect they mean the site google.com, because that’s been my experience. Whenever I get captcha’d there for using a VPN (which is getting more and more common), I always see the Maps image style captcha. Like 60% of the time it tells me I’m wrong anyway and I just give up.

They do indeed

With opnwrt you can do DNS hijacking, where you force redirect DNS requests for other servers to your own DNS server. This works as long as they aren’t encrypted (DNS over HTTPS or TLS), which most devices don’t use.

I almost did this for a different reason, people choose python because it has some pretty good web automation/scraping libraries to work with.