If you need to configure your search server to run multi-language searches, perform the following:
Create a New Content Text Processing Option (TPO):
On the Search server, open the Search Administration.
Go to the Search Administration > Customizations > Text Processing Option Sets > Content TPO Sets page.
Select Create New Content TPO Set.
Enter a Content TPO Set name.
In the Input Language option, select Use Content Level Setting Option and select the language for this set.
Click Save to save this Content TPO Set name.
Add a File System:
Open the Service project and select Content from the Projects tab.
In the Content Set panel, click Add Content.
Enter the Content Set Name
Open the Indexing Options Panel. In the Text Processing Option, select the TPO Set created above.
Change the Content Item Type to Index as Unstructured.
Select the Type of Content to be File System.
Enter the content file path, and click Add to create the content.
For additional information, refer to the ATG Search Installation and Configuration Guide.
