Hi Rodrigo,
Thank you for your interest in langify!
1. Unfortunately it is not possible to assign language specific handles / urls to your pages
2. As mentioned in my previous post, the translation of meta tags (title and description) will be supported in the next update of langify (which is going to be released next week). If you want Search Engines to be able to crawl your translations, you have to enable the domain feature of langify. That feature allows you to assign domains to your languages and allows Google & Co to crawl your translations.
You can read more about the domain feature here: http://langify.freshdesk.com/support/solutions/articles/1000075915-enabling-the-domain
Hope that helps and please let me know if you have any further questions :)