DeepL
Translates web pages, selected text and what you type into other languages, and helps polish your writing as you go.
Chrome extension
A third-party add-on that translates your ChatGPT questions into English and the answers back into your language, for non-English speakers.
Prompt Genie is a third-party add-on for ChatGPT that translates the questions you type in your own language into English, then translates the answers back. It is meant for non-English speakers who want to write naturally while ChatGPT works in English.
Open ChatGPT after installing and type your question in your own language, and Prompt Genie handles translation in both directions. Press Ctrl+Enter (Cmd+Enter on Mac) to translate the input box to English on demand.
It is not made by OpenAI and only works on the ChatGPT site. Machine translation can lose nuance, so double-check important answers.