blog widget does not work

Hello!
I have just installed a polylang plugin. Not professional edition. And I am facing an issue.
I have a widget with blog feeds on my website. The main language is Spanish. The widget is working fine.
The translating language is Catalan. My blog posts are at the moment are only in Spanish. When I activate the plugin Polylang, a widget is not showing any posts on Catalan page. I saw the issue, I have to create the translation of each blog post in Catalan and after I see the posts in the widget. BUT I don’t have the translation of my posts at the moment and I would like to show Spanish blog posts on my Catalan page.
One of the solution was to clone my Spanish posts and to say to the system that they are Catalan but I will have a penalty from Google for duplicated content.
I tried to submit the original url of a post for Catalan language but it does not work.
Any other possibilities? What would you recommend?
Kind Regards
Maria