The theme is ready for translation, however, it does not have the multilingual feature.
It can be done wth the help of the translation plugin, e.g:
The translation within Polylang is not automatic, you simply create a new page or copy the existing one and replace the content in another language.
The Ronneby theme is fully compatible with the WPML and we are in touch with WPML developers to fix any possible issue.
Detailed WPML documentation and guidance on how to translate the site you can find here.