The problem isn't "pretty easy" per-se (different translations assign different chapter/verse numbers in places, for example) but there has been lots of work spent on it already. There are protocols and formats to manage Bible texts, and entire organizations revolve around maintaining these (e.g.
https://crosswire.org/). Some of them even have provisions for dealing with copyrighted materials (with unlock keys that you can buy).
The red flags I see:
* That site doesn't mention such prior art _at all_.
* First thing I run into when trying to get a list of translations is Cloudflare. Nice, preparing for hyperscaling already! However, no discussion anywhere about the threat model of providing texts that can spell trouble in parts of the world through arbitrary third party services.