🔥(backend) remove i18n and localization from Django admin

[StephanMeijer]

Summary

• Disable Django i18n (USE_I18N = False) and remove LocaleMiddleware
• Remove LOCALE_PATHS, i18n template context processor, and gettext_lazy usage
• Replace {% trans %} tags with plain strings in admin templates
• Remove crowdin configuration and docker service

noChangelog

[Copilot]

Pull request overview

This PR removes the backend’s remaining Django i18n/localization plumbing, mainly to make the admin render only fixed English strings and to drop the unused translation workflow around it.

Changes:

• Disable Django i18n in settings and remove locale-specific middleware/context configuration.
• Replace {% trans %} usage and lazy translation wrappers in admin-facing templates/models/apps with plain strings.
• Delete Crowdin-related project files from the local Docker setup.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/backend/find/settings.py	Disables Django i18n, removes locale paths/context processor, and drops locale middleware.
src/backend/core/templates/admin/selftest.html	Replaces translated admin self-test UI labels with static English text.
src/backend/core/templates/admin/index.html	Replaces translated custom admin index labels with static English text.
src/backend/core/templates/admin/core/services/change_list.html	Replaces translated service changelist action text with a static label.
src/backend/core/models.py	Replaces lazy-translated model verbose names with plain strings.
src/backend/core/apps.py	Replaces the app config verbose name translation wrapper with a plain string.
crowdin/config.yml	Removes the Crowdin CLI configuration file.
compose.yml	Removes the local Crowdin Docker service.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[StephanMeijer]

Sounds like we should not run manage.py makemessages / compilemessages.

[jmaupetit]

I have mixed feelings about this. Even if it's not widely used, i18n is used…