| Bundle | The manifest plus the language files for one published version of a site |
| Control plane | Dashboard, API, jobs and engines; may go down without affecting visitors |
| Delivery plane | Static bundle files on your site and CDNs |
| Kid | Key id: names which signing key produced a manifest signature |
| Loader | The small script that applies a bundle to the page in the browser |
| Manifest | Signed JSON listing languages, files, hashes and CDN origins |
| Site key | Public identifier rl_site_... |
| Secret key | Server-side credential rl_sec_... |
| Source key | 16-hex-character hash that identifies one source string |
| Tenant | The customer account that owns sites and keys |
| SSR marker | <html data-rl-ssr="fr">, set by server-rendered pages so the loader does not translate twice |