Best practice for multi-language mails?

I have to design an email invitation for a customer. The customer offers a service for companies to communicate with their suppliers. So the companies enter the email addresses of their suppliers, and these are invited to create an account. Since I only have the addresses, I have no idea what language the invited person speaks. I think I'll have to include the text in several languages in the email or provide links "read in English", "lea en Español", "auf Deutsch lesen" and so on.

Any better ideas? Do you know examples of such emails that can be an inspiration?