Best practice for multi-language mails?

1. How do I send a multi language email?
2. How do I have multiple languages in Outlook?

How do I send a multi language email?

Google Translate offers a quick solution for sending multilingual emails. After you build your email, you can insert a translate link at the top of the template that will redirect to Google Translate. This will automatically translate your email content into the recipients' native language.

How do I have multiple languages in Outlook?

In Outlook 2019 and 2021

Note: In Outlook you have to open the message in its own window to get to the Review tab. Open Edit > Language > select Language. Review the languages shown above the double line in the Mark selected text as list. Office can detect only those languages listed above the double line.