There might be an issue with the translate plugin for Rainlab pages, when searching.
Everything is correct for the results from the rainlab blog pages, but not for the rainlab pages.
Always the lang code is added in the search results for the Rainlab pages.
If you klick the link then and type another search, it ends up in error, as the url looks would like this:
For the blog pages the search result is returned correctly:
I have turned off all translate extended parameters ...