The admin console where you build your event is in English and your event page and virtual event will also be in English. However you are able to customize most of the text labels that appears in your event to a different language.
On the Event Landing Page you can customize the text on these buttons / areas:
Event title and tagline
Enter event button
Buy / register button
Event page tabs
About tab description area
Sponsor description area
Note: Event page tab labels customization is only available for Professional and Enterprise Plans
In the Virtual Event Hub you can customize the text in these buttons / areas:
Note: Virtual Event Hub label customization is only available for Professional and Enterprise Plans
For the areas where the text labels cannot be edited, you can suggest for your attendees to install the Google Translate Extension to their Chrome browser. This will allow translation of any text that is highlighted.