BIP39 native-language display wordlists mapped to canonical English

This enhancement retains the English BIP39 mnemonic as the primary format, using localized words only as an overlay for easier accessibility during input and display. The core cryptographic processes remain unchanged to ensure compatibility with the existing English-based system. His proposal is designed to alleviate the difficulties faced by users who are not proficient in English by preventing common errors and insecurity during the backup and recovery process.

The proposal maintains strict adherence to the established protocols of BIP39, proposing that any local language implementations act as separate layers rather than replacements. Concerns were addressed regarding possible ambiguities between legacy and new mnemonic systems, suggesting that wallets should differentiate clearly through user interface cues and robust import/export behaviors. Daniel also emphasized the necessity for explicit mode selection to avoid confusion with existing non-English BIP39 wordlists.

Feedback on this proposal highlighted several issues, including the potential confusion arising from identical words across different language lists and the challenges related to maintaining checksum validity. It was suggested that implementing this scheme as a formal BIP would enhance interoperability among wallets and ensure consistent support across platforms. Additionally, considerations were made regarding the handling of diacritics and accented characters, advocating for stringent validation processes to prevent ambiguity during input.

In response to community feedback, Daniel revised his proposal to clarify the relationship with existing non-English BIP39 wordlists, ensuring that backups created with these lists remain valid. He documented a clear manual recovery path allowing a backup to be converted back to the English phrase manually, which can then be restored in any standard English BIP39-compatible wallet. Furthermore, he updated the draft to explicitly state that checksum validity is preserved and introduced deterministic prefix statistics reports for each language's display wordlists to address concerns about word uniqueness and collision.

Overall, Daniel's proposal seeks to improve the usability of cryptocurrency wallets for non-English speakers while maintaining the security and integrity of the cryptographic processes involved. His ongoing revisions and the inclusion of community feedback aim to refine and validate the feasibility of this enhancement before potentially formalizing it as a BIP.