Design an image-to-multilanguage translator

## Scenario Design a service that lets users upload an image containing text (e.g., a menu, screenshot, street sign), and returns the same image with the text translated into a target language (or multiple target languages). ## Requirements ### Functional - Upload an image and select **target language(s)**. - System performs **OCR** to detect text and bounding boxes. - Translate detected text into target language(s). - Return: - A **translated image** (text rendered back onto the image), and/or - A structured result: detected text blocks, bounding boxes, original text, translated text. - Support common image formats (JPG/PNG). Handle large images. ### Non-functional - Low latency for interactive usage (single image). - Scalable for bursts (batch-like spikes). - Reliability: retries, idempotency, job tracking. - Security & privacy: images may contain sensitive content. - Observability: metrics, logs, tracing. ## Deep-dive areas to be ready for - Frontend ↔ backend communication and security (authn/authz, request integrity). - Data model: what tables/documents exist, what each is used for. - How you store images and derived artifacts (OCR outputs, translations, rendered images). - Handling multiple target languages per image and caching.