When your search service is starting to crawl you get the following error message:
Access is denied. Verify that either the Default Content Access Account has access to this repository, or add a crawl rule to crawl this repository. If the repository being crawled is a SharePoint repository, verify that the account you are using has “Full Read” permissions on the SharePoint Web Application being crawled.
In order to customize your query to return results only from site collections created in a specific language you have the following option:
In search results sometimes different documents are indexed as duplicates. If you have the option Remove Duplicate Results in Search Core WebPart some content can be missed.
In a SPS2013 environment you have configured terms in term store in multiple languages (French and English). These terms have been configured to be used as refiners in the search center. In the document library, the metadata (that are linked to the same terms in the term store) are displayed using the correct language depending on the browser language or the language specified in mysite.