# open-notebook v1.8.5 — v1.8.5 - Spanish Locale & Token-Based Chunking

- Product: open-notebook (https://whatsnew.fyi/product/open-notebook)
- Vendor: lfnovo
- Date: 2026-04-19
- Version: v1.8.5
- Original notes: https://github.com/lfnovo/open-notebook/releases/tag/v1.8.5
- Permalink: https://whatsnew.fyi/product/open-notebook/releases/v1.8.5

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Spanish (es-ES) locale with 930+ translation keys and language toggle entry
- **changed** — Embedding chunking is now token-based instead of character-based, improving chunk sizing consistency for CJK and mixed-language content
- **changed** — OPEN_NOTEBOOK_CHUNK_SIZE and OPEN_NOTEBOOK_CHUNK_OVERLAP semantics changed from characters to tokens; default reduced from 1200 characters to 400 tokens to stay safely below the 512-token ceiling of BERT-family embedders
- **changed** — Migrated i18n from the custom Proxy pattern to standard react-i18next t() function for better tooling compatibility
- **fixed** — Credentials endpoint no longer crashes (500) when the encryption key does not match stored credentials
- **fixed** — Broken credentials are now shown with a decryption warning and can still be deleted
- **fixed** — DELETE endpoint for broken credentials supports model migration via the migrate_to parameter
- **fixed** — Azure credentials: base_url now correctly maps to endpoint

##### Highlights

- 🇪🇸 **Spanish (es-ES) language support** with full translation coverage
- **Token-based embedding chunking** — better handling of CJK and mixed-language content
- **Resilient credential handling** — broken/mismatched encryption keys no longer crash the API

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##### Added

- Spanish (es-ES) locale with 930+ translation keys and language toggle entry (#757) — thanks @chemazener!

##### Changed

- Embedding chunking is now token-based instead of character-based, improving chunk sizing consistency for CJK and mixed-language content (#542, #749) — thanks @unendless314!
- `OPEN_NOTEBOOK_CHUNK_SIZE` and `OPEN_NOTEBOOK_CHUNK_OVERLAP` semantics changed from characters to tokens; default reduced from 1200 characters to 400 tokens to stay safely below the 512-token ceiling of BERT-family embedders (e.g. mxbai-embed-large). Existing stored embeddings are unaffected — only new ingestions use the new chunking.
- Internal: migrated i18n from the custom Proxy pattern to standard react-i18next `t()` function for better tooling compatibility (#755)

##### Fixed

- Credentials endpoint no longer crashes (500) when the encryption key doesn't match stored credentials (#740, #753)
- Broken credentials are now shown with a decryption warning and can still be deleted
- DELETE endpoint for broken credentials supports model migration via the `migrate_to` parameter
- Azure credentials: `base_url` now correctly maps to `endpoint` (#741)

##### Docs

- Improved local quick-start documentation (#734) — thanks @vincentrou!

##### Dependencies

- Bump `langchain-openai` 1.1.7 → 1.1.14 (#762)
- Bump `langchain-text-splitters` 1.1.0 → 1.1.2 (#761)
- Bump `langchain-core` 1.2.22 → 1.2.28 (#737)
- Bump `langsmith` 0.6.4 → 0.7.31 (#759)
- Bump `authlib` 1.6.9 → 1.6.11 (#760)
- Bump `cryptography` 46.0.6 → 46.0.7 (#736)
- Bump `pytest` 9.0.2 → 9.0.3 (#752)
- Bump `python-multipart` 0.0.22 → 0.0.26 (#758)
- Bump `tornado` 6.5.4 → 6.5.5 (#668)
- Bump `next` 16.1.7 → 16.2.3 (#744)
- Bump `axios` 1.13.5 → 1.15.0 (#748)
- Bump `follow-redirects` 1.15.11 → 1.16.0 (#754)
- Bump `vite` 7.3.1 → 7.3.2 (#728)

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##### 🙏 Thanks

Huge thanks to everyone who contributed to this release:

- @chemazener — Spanish localization
- @unendless314 — token-based embedding chunking
- @vincentrou — documentation improvements

And thanks to all the users who opened issues and helped us prioritize what to ship next!

**Full Changelog**: https://github.com/lfnovo/open-notebook/compare/v1.8.4...v1.8.5