Python API for Seamless Translation using deep-translator and Flask


3 min read

Python API for Seamless Translation using deep-translator and Flask


In today's interconnected world, breaking language barriers is crucial for effective communication. Whether you're developing a global application or simply looking to enhance user experience, creating a translation API can be a game-changer. In this blog post, we'll embark on a journey to build a powerful multilingual translation API using two popular Python libraries โ€“ deep-translator and Flask.

Understanding the Tools:

1. Deep-Translator:

Deep-Translator is a versatile Python library that leverages various translation engines to provide accurate and context-aware translations. With support for multiple languages and a user-friendly interface, it's a go-to choice for developers aiming to integrate translation capabilities into their projects.

2. Flask:

Flask, a lightweight and flexible web framework for Python, is ideal for building web applications, including APIs. Its simplicity and extensibility make it a perfect companion for our translation API project.

Key Features of Our Translation API:

  1. Automatic Language Detection:

    • Our API will automatically detect the source language, eliminating the need for users to specify it explicitly.
  2. Dynamic Translation:

    • Leveraging the capabilities of deep-translator, our API will provide dynamic and context-aware translations for a wide array of languages.
  3. User-Friendly with Flask:

    • The Flask framework will be employed to create a user-friendly and accessible API endpoint, ensuring seamless integration into various applications.

The Translation Process:

Our translation API will use a straightforward approach. Users will send a request to the API with the text to be translated and the target language. The API, powered by deep-translator, will then perform the translation and return the result.

Let's get started

Step 1: Install Packages

Open your terminal or command prompt and run the following commands to install Flask and deep-translator:

pip install Flask
pip install deep-translator

Step 2: Create a Main File

Create a new file named in your project directory. This will be the main Python file for your Flask application.

Step 3: Write the API

Open in a text editor and start building your Flask application. Below is a basic example of a translation API:

from flask import Flask, request, jsonify
from deep_translator import GoogleTranslator

app = Flask(__name__)

@app.route('/translate', methods=['POST'])
def translate_text():
        data = request.get_json()
        text = data['text']
        target_language = data['target_language']

        # Use deep-translator to perform the translation
        translated = GoogleTranslator(source='auto', target=target_language).translate(text)

        return jsonify({'translated_text': translated})

    except Exception as e:
        return jsonify({'error': str(e)})

if __name__ == '__main__':

Step 4: Run the Application

Save your file and run the Flask application using the following command in your terminal or command prompt:

Your Flask application should start, and you'll see output indicating that the server is running. By default, the server will run on

Step 5: Test the API

You can use a tool like Postman or simply use Python's requests library to test your API. Send a POST request to with a JSON payload:

    "text": "Hello, how are you?",
    "target_language": "ta"

This example sends a request to translate the English text "Hello, how are you?" to Tamil (target language code "ta").


In summary, this blog post guided you through the straightforward process of building a translation API using Flask and the deep-translator library. By following a few simple steps, you can now effortlessly integrate language translation capabilities into your applications, enhancing user experience and broadening your project's reach. Explore the possibilities and tailor the API to meet your specific requirements for seamless multilingual communication.