Based on your screenshot, it seems that you want to identify and report on "Internal search keywords" by language?
We had the same challenge for a client and the solution we came up with is, that we are writing the search queries to xDB by always using the visitor's currently displayed culture as a prefix.
riz you would have
This allows, if you are able to export data from xDB for internal search (for example using the Experience Extractor module) you could parse them as CSV in Excel and thus report internal search keywords by language/culture.
Here's an example how this could look in Experience Analytics in Sitecore:
We came to this solution once we realised, that Sitecore xDB facets for internal search keywords doesn't allow adding more facets such as language/culture for an additional dimension. Thus I also think you will hit a limit for customizing the Experience Analytics interface in this regards, but in case you come up with such a UI based solution, I'd be also very interested in knowing :)