Use something link this (it isn’t optimized, but you can understand logic):
def localized_haml(template)
R18n.get.locales.each do |locale|
return haml "#{template}.#{locale}" if File.exists? "view/#{template}.#{locale}.haml"
end
return haml template
end

you could even override haml and call super in it. or render, if you want it more general.

I almost have it but it's not quite working.

See Gist of my haml override method

When I load my page in my Sinatra app the

= yield

bit of my layout.haml file just inserts the localised template name and not the results of the template.

Aha I got it working. Of course I need to pass a the file contents of the template, not the name of the template :-)

I'd go with:

def localized_haml(template)
return haml :"#{template}.#{r18n.locale.code}" if File.exists? "views/#{template}.#{r18n.locale.code}.haml"
return haml template
end