# Enabling automatic translation in your Mastodon v4 instance 1. Sign up on [DeepL](https://www.deepl.com/). They have a free plan, though they will collect your credit card information to prevent abuse (which is totally understandable). 2. Visit your [DeepL account page](https://www.deepl.com/account/summary) and copy your Authentication Key from the section at the bottom of the page. It’ll be a long series of characters. 3. On your Mastodon server, open up your `.env.production` fil...