Write an email invitation to beta testers in international markets for the global launch of [ProductName]. Address the email to regional stakeholders and mention the unique needs of their specific markets, such as language preferences or regulatory requirements. Specify the start and end dates of the beta testing period for their region ([Region]), and include any local customization details or features specific to their market. Make it clear how participation in the beta test will help the product cater to regional demands and encourage localized feedback. Provide the necessary registration link and emphasize the exclusivity of being selected for this early opportunity.