class Maglev::ExtractLocale

and set the Translatable.current_locale accordingly
Extract the locale from the current HTTP request

def call 

def call
  locale, path = extract_locale
  Maglev::I18n.current_locale = locale
  params[:path] = path
  [path, locale]
end

def default_locale 

def default_locale
  locales.first
end

def extract_locale 

def extract_locale
  path = params[:path] || 'index'
  segments = path.split('/')
  return [default_locale, path] unless locales.include?(segments[0]&.to_sym)
  [segments.shift, segments.empty? ? 'index' : segments.join('/')]
end