Yes, we currently support 25 languages and counting.
To choose a single survey language for your customers visit Settings -> Customize Survey and selecting Survey Language.
To enable the email survey in multiple languages, configure your language dynamically to match your customer's language
a) via our email API, if you are sending the surveys yourself
b) by customizing the corresponding email survey template, if you're using a third party email service like Mailchimp.
Don't see the one you need? Let us know! We are always happy to add more languages if you're willing to help us out. Please email us or reach out to us through Intercom with your language requirements and we'll take care of it.