I don't think it's really interesting to pass a list of locales.
To my mind, it's important to validate one locale or all of them, no?.

For instance, only the english locale:
`validates :name_en, presence: true`

The current locale:
`validates :name, presence: true`

All the locales even if it's not the current one:
`validates_hstore_translate :name, presence: true`