module I18n::Backend::Simple::Implementation

def store_translations(locale, data, options = EMPTY_HASH)

level of the hash.
translations will be overwritten by new ones only at the deepest
This uses a deep merge for the translations hash, so existing
Stores translations for the given locale in memory. 
def store_translations(locale, data, options = EMPTY_HASH)
  if I18n.enforce_available_locales &&
    I18n.available_locales_initialized? &&
    !I18n.locale_available?(locale)
    return data
  end
  locale = locale.to_sym
  translations[locale] ||= Concurrent::Hash.new
  data = Utils.deep_symbolize_keys(data) unless options.fetch(:skip_symbolize_keys, false)
  Utils.deep_merge!(translations[locale], data)
end