Translate with AI

// Creator asks for machine translation; your server calls the AI provider
creator.onMachineTranslate.add(async (_, options) => {
  const res = await fetch("/api/translate", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ strings: options.strings, from: options.fromLocale, to: options.toLocale })
  });
  options.callback(res.ok ? await res.json() : []);   // same order as options.strings; [] when it failed
});

// POST /api/translate — strings in, translated strings out (same order); nothing goes to SurveyJS
Route::post('/api/translate', function (Request $request) {
    abort_unless(config('surveyjs.ai.api_key'), 501, 'Set AI_API_KEY to enable translation');
    ['strings' => $strings, 'from' => $from, 'to' => $to] = $request->only(['strings', 'from', 'to']) + ['strings' => [], 'from' => '', 'to' => ''];

    $translated = AiTranslation::translate($strings, $from, $to);            // any OpenAI-compatible provider: your key, your choice
    abort_unless(is_array($translated) && count($translated) === count($strings), 502, 'The AI provider returned an unexpected answer');

    return response()->json($translated);                                    // what options.callback() takes
});