# CMS Architecture

```
codepress/
├── cms/core/                # Core engine
│   ├── class/               # CodePressCMS, ThemeManager, Logger, Analytics
│   ├── plugin/              # PluginManager, PluginAPIInterface, CMSAPI, AdminPluginAPI
│   ├── config.php           # Config loader
│   └── index.php            # Bootstrap
├── admin/                   # Admin console
│   ├── config/              # app.php, admin.json
│   ├── src/                 # AdminAuth
│   └── theme/default/views/ # Twig templates
├── themes/                  # Themes (default, ...)
├── plugins/                 # Plugins (Dashboard, HTMLBlock, Navigation, ...)
│   └── <Plugin>/            # Each plugin has:
│       ├── <Plugin>.php     # Main class
│       ├── plugin.json      # Metadata + settings
│       ├── README.md        # Documentation
│       ├── assets/          # CSS/JS/SCSS
│       └── language/        # Plugin translations (nl/, en/, ...; admin.php/site.php)
├── content/                 # Content files (.md, .php, .html)
├── language/                # Core CMS language files (nl/, en/, de/; site.php + admin.php)
├── guide/                   # Guides (nl/, en/)
├── public/                  # Web root
│   ├── index.php            # Website entry point
│   └── admin.php            # Admin entry point + router
├── config.json              # Site configuration
└── version.php              # Version info
```

## Plugin i18n

Plugins have their own `language/` directory with translations. System plugins follow the admin language (`language/<lang>/admin.php`), content plugins follow the content language (`language/<lang>/site.php`). Fallback chain: selected language → plugin `default_language` → CMS site default → empty array. See `guide/en/codepress-developer/plugin-development.md` for details.