Hi @as11
Welcome to the Auth0 Community!
I anm sorry about the late reply to your post.
If you are using Universal Login for you application, as mentioned in our documentation about using Passwordless with Magic Links, this feature is unavailable and it can be used only with the Classic Login.
In regards to your multilingual approach to the verification emails, please review our documentation regarding using Liquid Syntax in Email Templates, however this approach can not be feasible since you might be limited by the size limit of the templates.
Otherwise, Auth0 does not provide the option to send both a verification link and code via the same email at this time and also we do not have any features available for email localization. Feel free to submit a Feature Request. This is a direct line to our Product team and the best way to communicate this type of request.
If you have any other questions regarding the matter, feel free to leave another reply on the post.
Kind Regards,
Nik