This 2020 publication looks at some of the past proposals, including proquint, for word-based encoding of long cryptographic keys and hashes.

https://www.cambridgeclarion.org/14.html

As in:

67B4 007A FFFD = walnut barley onion lizard fifty friday

We see a lot of similar schemes in the cryptocurrency walled, where they mostly originate from Bitcoin BIP-39 standard:

https://en.bitcoin.it/wiki/BIP_0039