English is a two-pane IDE. On the left you write what you want in plain English; on the right an LLM keeps a working translation in your chosen language — Arduino C++, Python, Ruby or JavaScript. Click any line on either side and the matching region on the other side lights up, with a ribbon linking them; click a line in the code pane to also drop a one-line gloss of what it does right below it, with an explain button for a fuller plain-English sentence. When the target is Arduino C++ you can Verify (compile in the cloud) and Upload the result to a connected board over Web Serial, then watch it with the Serial Monitor.

Buttons

• Translate (⌘↵ / Ctrl-↵) — re-runs the translation now. It also runs automatically a few seconds after you stop editing (and never while a translation is still in flight).
• Verify — compile the generated C++ only. Needs the internet, not a board. (Arduino C++ target only.)
• Upload — compile then flash it to your Arduino over Web Serial. (Arduino C++ target only.)
• Open Serial Monitor — opens the port and streams whatever the sketch Serial.print()s.
• Examples (⌘K / Ctrl-K) — load one of the bundled English programs.

Web Serial needs Chrome / Edge / Opera, served over http://localhost or https://. Flashing is wired for ATmega328P boards (Uno, Nano, Pro Mini); other boards still compile.