Roadmap and status for non-English language support (FR, ES, IT, DE, etc.)

Hi,

First of all, great work on Harper. The project looks extremely promising and feels like a very solid alternative to existing solutions such as Grammarly or LanguageTool, especially in terms of performance, privacy, and overall philosophy.

At the moment, Harper only supports English. I have tried to look through the documentation, the README, issues, and discussions, but I could not find clear information about the status or roadmap regarding support for other languages.

I would love to understand a few things:

- Is support for other languages (for example French, Spanish, Italian, German) planned at some point?
- Are there already people actively working on non-English language support?
- Is the core architecture considered mature enough for external contributors to realistically add new languages?
- If not planned, is this more a matter of priorities, resources, or inherent complexity?

I think it is a bit unfortunate that there is no clear, centralised information about this topic, because Harper is really exciting and could be extremely attractive to non-English users if multilingual support were on the horizon.

Thanks again for building such a great tool, and thanks in advance for any insight you can share.

Best regards,

The issue points to the README, documentation, issues, and discussions but names no implementation files or tests. Start by reviewing the 44-comment thread and existing project information; done means a clear, centralized statement of the roadmap, current work, architecture readiness, and constraints for non-English support.

Written by the indexing model from the issue text.