English is the default interface language. You can change it in your user profile after signing up to an account and logging in. Whatever language you set as the interface language; you will still have access to all available webinars in other languages.
1: Sign up for an account.
2: Check your inbox and click the link in the account activation email.
3: Sign into your account.
4: Access your 'Info' page.
5: Choose the desired interface language.