Automatically Copy & Translate Telegram Channel Content with GPT-4o-mini

Description

Overview
This n8n workflow automatically fetches the latest post from a Telegram channel, translates it using OpenAI, and republishes it to another channel. It supports text, images, and videos.

Features
Works Without Admin Privileges** - Does not require any bot to be an admin in the source channel.
Scheduled execution** - Runs daily at a configurable time
AI-powered translation** - Uses OpenAI GPT-4o-mini for natural translations
Multi-media support** - Handles text, images, and videos
Easy configuration** - All settings in one centralized node
Automatic content cleaning** - Removes original channel signatures

Prerequisites

Required Credentials
Telegram Bot API
Create a bot via @BotFather
Get your bot token
Add the bot as an admin to your target channel

OpenAI API
Sign up at OpenAI Platform
Generate an API key
Ensure you have sufficient credits

Channel Requirements
Source Telegram channel must be public
Bot must have admin rights in the target channel

Setup Instructions

1. Import the Workflow
Copy the workflow JSON and import it into your n8n instance
The workflow will be imported in inactive state

2. Configure Credentials

Telegram Bot Credentials
Go to Credentials → Add Credential
Select Telegram
Enter your bot token from BotFather
Test the connection
Save as "TelegramBot"

OpenAI Credentials
Go to Credentials → Add Credential
Select OpenAI
Enter your OpenAI API key
Save as "OpenAI API"

3. Configure Channel Settings
Open the "Set Source Channel" node and modify:

sourceChannel: "channel_here", // Source channel username (without @)
targetChannel: "@your_channel_here", // Target channel (@channel or chat_id)
targetLanguage: "Persian", // Target language for translation
channelSignature: "signature text" // The channel signature to replaced

4. Adjust Schedule (Optional)
Open the "Daily Schedule" node
Default: Runs daily at 9:00 AM
Modify triggerAtHour and triggerAtMinute as needed

5. Test the Workflow
Click "Execute Workflow" to test manually
Check if content appears in your target channel
Verify translation quality and formatting

6. Activate the Workflow
Toggle the workflow to Active status
Monitor execution logs for any errors

Content Filtering
Modify the "Clean Post Content" node to remove specific text patterns:
let cleanPost = $input.first().json.post
.replaceAll('unwanted_text', '')
.replaceAll(/regex_pattern/g, '')
.trim();

Multiple Source Channels
To monitor multiple channels:
Duplicate the workflow
Change the sourceChannel in each copy
Use different schedules to avoid conflicts

Custom Scheduling
The Schedule Trigger supports various patterns:
Hourly**: { "triggerAtMinute": 0 }
Weekly**: { "triggerAtWeekday": 1, "triggerAtHour": 9 }
Multiple times**: Use multiple schedule nodes

Troubleshooting

Common Issues

No content fetched
Verify source channel is public
Check if channel name is correct (without @)
Ensure channel has recent posts

Translation fails
Verify OpenAI API key is valid
Check API usage limits and credits
Ensure content is not empty

Can't send to target channel
Verify bot is admin in target channel
Check channel username/ID format
Test bot permissions manually

Compliance
Respect copyright and fair use policies
Add proper attribution when required
Follow Telegram's Terms of Service