Call-back and email support are available in English, Spanish, German, Japanese, and French. Call-in support is currently available in English. Localized support documentation is available at http://academy.hubspot.com by clicking the globe icon at the top-right of the page.
Services and consulting are currently available in English and a limited number of additional languages. For more information, please see the description of the Services offering you are interested in or reach out to your Customer Success Manager or Sales Rep.
For more information on what HubSpot product features are optimized for international businesses, please see this article.