Can I implement individual template or language customization for a particular account or plan?

No. In terms of the H-Sphere interface visual settings, only two types of accounts are customized, regardless of plans: admin accounts which are H-Sphere administrative accounts, and user accounts – all other accounts. Reseller accounts are regarded as user accounts, except for the reseller administrative account which relates to the admin account type. Thus, you can customize all admin interfaces or all user interfaces but it is not possible to customize any account or plan individually.