docs(readme): list the 20 available interface languages and RTL support

README.md

@@ -103,6 +103,14 @@ coding-agent handoff.
   (Claude, Codex, Copilot, OpenCode) over a **loopback-only, token-gated** MCP server that is off
   by default, scope-limited, audited, and **adds no egress** — data leaves only via the agent's
   own provider, which WA discloses.
+- **20 interface languages, with RTL** — the whole UI (shell, meetings list, transcript/notes,
+  summary, and Settings) is available in **20 languages**, chosen under **Settings ▸ Language**:
+  Arabic (العربية), Bengali (বাংলা), Simplified Chinese (中文简体), English, Finnish (Suomi),
+  French — France & Canada (Français), German (Deutsch), Hindi (हिन्दी), Korean (한국어),
+  Norwegian Bokmål (Norsk bokmål), Portuguese — Brazil & Portugal (Português), Russian (Русский),
+  Sinhala (සිංහල), Spanish — Spain & Mexico (Español), Swedish (Svenska), Tamil (தமிழ்), and
+  Urdu (اردو). Selecting Arabic or Urdu flips the interface to **right-to-left**; any untranslated
+  string falls back to English rather than showing a raw key. Adding a language is a one-file job.
 - **One universal installer** — a single signed MSI and NSIS `-setup.exe` that covers every
   machine: Vulkan for all GPUs, the Intel NPU path (+ DirectML fallback), and CPU. The Vulkan
   loader is bundled so it launches even on machines without a GPU driver.