This describes the steps for embedding a project page, but look for similar options in other embeds in the dashboard, such as meeting registration
In your project page, head over to the settings tab and click Get Embed Code:
A set of options will appear for your embed format. After choosing your preferred format, you'll see an initial embed code and an option to "Customize your embed language". Click that button.
You'll now be able to select your embed's language code:
Changing the dropdown will automatically update the embed code. The embedded page will follow the automatic or customized translation you've setup using Last Mile Translation.