The choice of programming language for developing an eCommerce website depends on various factors such as the requirements of the project, the expertise of the development team, scalability needs, and the availability of resources and frameworks. However, some programming languages are commonly used in eCommerce development due to their robustness, flexibility, and community support. Here are a few popular choices:

1. PHP: PHP is a widely used server-side scripting language known for its simplicity and extensive community support. It has several frameworks like Laravel, Symfony, and CodeIgniter that provide eCommerce-specific functionalities and libraries. Popular eCommerce platforms like Magento and WooCommerce are built with PHP.

Example: Magento, a leading eCommerce platform, is written in PHP and provides a feature-rich environment for online stores.

2. Python: Python is a versatile and easy-to-read language with a vast ecosystem of libraries and frameworks. Django and Flask are popular Python frameworks that can be used to build eCommerce websites. Django offers a high-level of abstraction and includes built-in security features, making it suitable for complex eCommerce projects.

Example: Saleor, an open-source eCommerce platform built with Python and Django, provides a customizable and scalable solution for online stores.

3. JavaScript: JavaScript is a client-side scripting language that has gained popularity for building interactive and dynamic web applications. It can be used with various frameworks like React, Angular, or Vue.js to create responsive eCommerce websites. JavaScript is also used for server-side development with Node.js.

Example: Shopify, a widely used eCommerce platform, utilizes JavaScript extensively for client-side interactions and customizations.

4. Ruby: Ruby is a dynamic, object-oriented programming language known for its simplicity and readability. The Ruby on Rails framework provides a robust development environment for eCommerce websites. It offers convention over configuration, making it efficient for rapid development.

Example: Spree Commerce, an open-source eCommerce platform built with Ruby on Rails, provides a flexible and customizable solution for online stores.

It's important to note that the choice of programming language is just one aspect of eCommerce development. Other factors like database management, security, scalability, and integration with payment gateways and third-party services should also be considered.

References:
- Magento: https://magento.com/
- Saleor: https://saleor.io/
- Shopify: https://www.shopify.com/
- Spree Commerce: https://spreecommerce.org/
- Laravel: https://laravel.com/
- Symfony: https://symfony.com/
- CodeIgniter: https://codeigniter.com/
- Django: https://www.djangoproject.com/
- Flask: https://flask.palletsprojects.com/
- React: https://reactjs.org/
- Angular: https://angular.io/
- Vue.js: https://vuejs.org/
- Node.js: https://nodejs.org/