When I try to search in another language, I click Advanced Search → Languages → specific language. It is a little tiresome if I repeat this for different langauges, and different key words. I wonder if I can make it simplified; for example, move the language choice to the search main page without clicking Advanced Search, or even make a button for each of those often-used languages on the main page?
Similar question for geographical region search.
keyword site:*.ru will make Google search inside Russian websites? What difference is it from searching in either Russian language or Russia country?