Feature Request: Add internationalization (i18n) support and Vietnamese localization

[mydalat]

Summary

I would like to contribute Vietnamese (vi) localization to Fizzy. Before submitting a PR, I wanted to discuss the best approach with the maintainers.

Background

I've been using Fizzy for my team in Vietnam and have created a complete Vietnamese translation. However, since Fizzy currently has hardcoded English strings in views, I had to:

1. Add rails-i18n gem for Rails i18n support
2. Create config/locales/vi.yml with Vietnamese translations
3. Modify views to use t() helper instead of hardcoded strings

Proposal

I see two possible approaches:

Option A: Full i18n Implementation (Recommended)

• Add i18n infrastructure to Fizzy
• Migrate all views to use t() helper
• Create en.yml as the default locale
• Add vi.yml for Vietnamese

Pros: Enables future translations, follows Rails conventions
Cons: Large PR, many file changes

Option B: Vietnamese-only Fork

• I maintain my own fork with Vietnamese support
• No changes to upstream

Pros: No impact on main repo
Cons: Community doesn't benefit, harder to sync updates

What I've Already Done

I have a working implementation that includes:

• 500+ translated strings covering:

  • Navigation & layouts
  • Authentication (login, signup, magic links)
  • Boards, cards, columns
  • Comments & reactions
  • Notifications & settings
  • Webhooks
  • Email templates
  • Error messages & validations

• Views migrated to use t() helper (~50 files)

Questions for Maintainers

1. Is i18n support something you'd consider adding to Fizzy?
2. If yes, would you prefer:
   • A single large PR with everything?
   • Multiple smaller PRs (infrastructure first, then locale files)?
3. Should I create an en.yml file extracting current English strings?

Sample of vi.yml

vi:
  navigation:
    home: "Trang chủ"
    boards: "Bảng"
    notifications: "Thông báo"
    settings: "Cài đặt"
    
  cards:
    status:
      not_now: "Tạm hoãn"
      maybe: "Có thể?"
      done: "Hoàn thành"
    
  notifications:
    index:
      title: "Thông báo"
      mark_all_read: "Đánh dấu tất cả đã đọc"
      new_for_you: "Mới cho bạn"

[mbajur]

Please see #1970

[xavivars]

@mydalat, in this thread @jzimdars was open to look at potential pull requests to evaluate if they should accept the functionality. #1970 (comment)

Could you try to open for your "full localization proposal" (I'd personally start infrastructure first, to narrow down the scope of the PR)?

I'm willing to contribute to that PR too (and, later, create a Catalan translation)