hiproxy is a lightweight proxy tool for Front-End developers
...To develop your web projects in a local development environment, you’ll have to run a back-end server (such as a Node.js express application, or a Java SpringBoot application). As a front-end developer, you might not be familiar with the back-end technology stack, simply setting up the development environment can consume a lot of your time.
SWeTE is an HTTP reverse proxy that provides website translation. You can set up proxies for any sites, then connect a translation memory to the site to have it translated into any language. It provides a web-based translation form, and an option to translate strings using Google's translation API.