DeepL and Gmail integration

Translate and localize content using DeepL and GPT-4o-mini Managing high-quality translations across multiple languages often requires more than just machine translation; it requires cultural context and quality assurance. This workflow automates the entire pipeline, from initial translation to AI-driven quality scoring and cultural localization. Who is this for? Content Teams:** To automate the first draft and review process for blog posts or documentation. Marketing Agencies:** To localize campaign copy for international markets quickly. Product Managers:** To manage UI/UX copy across different regions with consistent glossary support. How it works Content Intake: A Webhook receives the source text and a list of target languages. Language Detection & Validation: The workflow identifies the source language and validates the requested target codes. Parallel Processing: Using the Split Out node, the workflow processes each target language simultaneously. DeepL Translation: High-quality neural machine translation is performed for each language. AI Quality Review: GPT-4o-mini acts as a professional linguist, scoring the translation on accuracy, fluency, and style, and flagging any issues. Cultural Localization: A specialized node applies region-specific formatting for dates and currencies. Aggregation & Reporting: All results are unified, logged to Google Sheets, emailed via Gmail, and returned as a JSON response to the initial requester. How to set up Credentials: Connect your DeepL API, OpenAI, Google Sheets, and Gmail accounts. Google Sheets: Create a sheet with headers: Job ID, Source Text, Languages, Avg Quality, and Completed. Paste the Sheet ID into the Google Sheets node. Webhook: Use the production URL in your CMS or app to trigger the workflow with a POST request. Requirements DeepL API Key** (Free or Pro) OpenAI API Key** (for GPT-4o-mini) Google Account** (for Sheets and Gmail) How to customize Adjust AI Rubric:** Modify the "AI Quality Review" prompt to focus on specific brand voice guidelines or technical terminology. Glossary Support:** Update the DeepL node to include specific Glossary IDs for industry-specific jargon. Localization Rules:** Add more regions or specific formatting rules (like measurement conversions) in the "Apply Localization" Code node.

Who's it for Customer support teams, sales representatives, and international business professionals who need to handle multilingual email communication efficiently while maintaining quality control through human approval. How it works This workflow automates email responses by: Monitoring Gmail for emails with a specific label (e.g., "To_Process") Translating the email content using DeepL to your preferred language Generating an AI-powered summary and draft reply using OpenAI Requesting approval via Slack with a summary and one-click approval link Sending the reply only after human approval is received Removing the label to prevent reprocessing Set up steps Setup takes approximately 15-20 minutes: Configure credentials for Gmail, DeepL, OpenAI, and Slack Create a Gmail label for emails to process Update the Slack channel ID in the configuration node Ensure n8n is accessible via webhook (tunnel or production mode required) Requirements Gmail account with OAuth2 authentication DeepL API key (free tier available) OpenAI API key Slack workspace with OAuth2 app configured n8n instance accessible via webhook URL How to customize the workflow Change translation language**: Modify the DeepL node's target language Adjust AI model**: Switch between GPT-4 or GPT-3.5 in the OpenAI node Customize approval message**: Edit the Slack message format Add multiple languages**: Duplicate the translation node for multi-language support Filter specific senders**: Add conditions to process only certain email addresses

Who's it for This workflow is perfect for content creators, international teams, and businesses that need to translate documents into multiple languages automatically. Whether you're localizing documentation, translating marketing materials, or creating multilingual content, this workflow saves hours of manual work. What it does Automatically monitors a Google Drive folder for new documents (PDF, DOCX, TXT, or Markdown) and translates them into multiple languages using DeepL API. Each translated document is saved with a language-specific filename (e.g., document_en.pdf, document_zh.pdf) in a designated folder. You receive an email notification when all translations are complete. How it works Monitors a Google Drive folder for new files Detects file format (PDF/DOCX/TXT/Markdown) and extracts text Translates the content into your chosen languages (default: English, Chinese, Korean, Spanish, French, German) Saves translated files with language codes in the filename Sends an email notification with translation summary Optional: Records translation history in Notion database Set up instructions Requirements Google Drive account (for file storage) DeepL API key (free tier: 500,000 characters/month) Gmail account (for notifications) Notion account (optional, for tracking translation history) Setup steps Create Google Drive folders: Create a "Source" folder for original files Create a "Translated" folder for output Copy the folder IDs from the URLs Get DeepL API key: Sign up at DeepL API Copy your API key Configure the workflow: Open the "Configuration (Edit Here)" node (yellow node) Replace folder IDs with your own Set your notification email Choose target languages Set up credentials: Add Google Drive OAuth2 credentials Add DeepL API credentials Add Gmail OAuth2 credentials Activate the workflow and upload a test file! Customization options Change target languages**: Edit the targetLanguages array in the Configuration node (supports 30+ languages) Adjust polling frequency**: Change trigger from "every minute" to hourly or daily for batch processing Enable Notion tracking**: Set enableNotion to true and provide your database ID Add more file formats**: Extend the Switch node to handle additional file types Filter by file size**: Add conditions to skip files larger than a certain size Supported languages EN (English), ZH (Chinese), KO (Korean), JA (Japanese), ES (Spanish), FR (French), DE (German), IT (Italian), PT (Portuguese), RU (Russian), and 20+ more. Performance Short files** (1 page): ~30 seconds for 6 languages Medium files** (10 pages): ~2 minutes for 6 languages Large files** (100 pages): ~15 minutes for 6 languages Technical Details Trigger**: Google Drive folder monitoring (1-minute polling) Translation**: DeepL API with automatic source language detection Loop implementation**: Split Out + Aggregate pattern for parallel translation Error handling**: Catches API failures and sends email alerts Storage**: Original file format preserved in translated outputs Notes DeepL free tier provides 500,000 characters/month (approximately 250 pages) For high-volume translation, consider upgrading to DeepL Pro The workflow creates new files instead of overwriting, preserving translation history Google Docs are automatically converted to the appropriate format before translation What You'll Learn This workflow demonstrates several n8n patterns: File format detection and routing (Switch node) Loop implementation with Split Out + Aggregate Binary data handling for file operations Conditional logic with IF nodes (optional features) Cross-node data references Error handling and user notifications Perfect for learning automation best practices while solving a real business problem!