Dear colleagues,

The following is a password format that improves upon BIP39 by allowing meaningful, themed sentences with a regular grammatical structure instead of semantically disconnected words, while keeping the same entropy/checksum and total bits/non-repeating leading digits ratios (of 32/1 and 11/4 respectively).

https://github.com/Yuri-SVB/formosa

Anecdotal experiments suggest that less than one hour of moderate concentration is enough for long term memorization of 128 + 4 bits (equivalent to the 12 words standard of BIP39) if a theme of interest is employed.

I hereby offer it to your scrutiny as a Bitcoin Improvement Proposal. Please don't hesitate to ask whatever issue about the project there might be.

Faithfully yours, Yuri S VB.