Allow e-mail templates by language

It would be nice to be able to write multiple magic link email templates in many languages. When requesting the magic link, we could pass a locale (pt, pt-BR, en, en-US, en-NL, etc.) and get the most appropriate e-mail template to send to the user.

nHost example:

https://docs.nhost.io/products/auth/email-templates https://docs.nhost.io/products/auth/email-templates#languages https://docs.nhost.io/reference/javascript/auth/sign-in-email-otp#parameters (options.locale)