The Efficiency of Language Field for Retrieving Farsi and Arabic Results in Search Engines (Comparative Study: Google, Bing, & Yahoo)

To investigate the efficiency of the language restriction feature in Google, Bing and Yahoo search engines and to determine the most efficient search engine in retrieving relevant results in Farsi and Arabic.
A survey on a sample of 38 homonyms with different meanings in Farsi and Arabic.
Google search engine showed a lower performance compared to the other two search engines in terms of the number of results retrieved and ranking the relevant results to the target language. There was no significant difference among the three search engines in retrieving irrelevant results to the target language. However, a significant difference was seen among Google and the other search engines in ranking the irrelevant results to the target language. Also, no relationship was found between the performance of the search engines in retrieving irrelevant results to the target language and traffic and popularity of irrelevant pages.
Those using the language restriction feature for Farsi and Arabic are more likely to see relevant results in Yahoo and Bing search engines.