Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Who's it for Customer support teams, sales representatives, and international business professionals who need to handle multilingual email communication efficiently while maintaining quality contro...

Best for

Ticket Management automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.gmailtrigger, n8n-nodes-base.set, n8n-nodes-base.deepl, @n8n/n8n-nodes-langchain.openai, n8n-nodes-base.slack, n8n-nodes-base.wait, n8n-nodes-base.gmail, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Asuka.

Original n8n.io source

1.1 Workflow description

Title: Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval
Workflow name: Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval

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

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Gmail Trigger

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.3

Block 2 - Configuration

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 3 - Translate Email

Type / Role: n8n-nodes-base.deepL - deepL
Config choices: Version 1

Block 4 - Generate AI Response

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1

Block 5 - Request Approval

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.3

Block 6 - Wait for Approval

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 7 - Send Email Reply

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 8 - Mark as Processed

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 9 - 📋 Template Overview

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Step 1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Step 2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Step 3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 13 - Step 4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Step 5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 15 - Step 6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval
Complexity	advanced
Nodes	15
Categories	Ticket Management, Multimodal AI
Author	Asuka
Published	17 Nov 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/10907/10907.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Ticket Management workflows Multimodal AI workflows

Frequently asked questions

What does Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Ticket Management, Multimodal AI use case.

Asuka

3 workflows

Nodes

n8n-nodes-base.gmailtrigger n8n-nodes-base.set n8n-nodes-base.deepl @n8n/n8n-nodes-langchain.openai n8n-nodes-base.slack n8n-nodes-base.wait n8n-nodes-base.gmail n8n-nodes-base.stickynote

Complexity

advanced

Published 17 Nov 2025

Likes 0

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Install path: /data/workflows/10907/10907.json

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Multilingual email auto-replies with DeepL, GPT-4o and Slack human approval

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who's it for

How it works

Set up steps

Requirements

How to customize the workflow

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Gmail Trigger

Block 2 - Configuration

Block 3 - Translate Email

Block 4 - Generate AI Response

Block 5 - Request Approval

Block 6 - Wait for Approval

Block 7 - Send Email Reply

Block 8 - Mark as Processed

Block 9 - 📋 Template Overview

Block 10 - Step 1

Block 11 - Step 2

Block 12 - Step 3

Block 13 - Step 4

Block 14 - Step 5

Block 15 - Step 6

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions