Also, don't underestimate taking away revenue sources from your competitors. If your competitor competes with you at A, but makes money at B, then taking away that B revenue stream affects their ability to compete with you at A as well.
There's Yandex which operates Russia's largest search engine (65% market share) which also runs Yandex Translate [0]. There's also Microsoft Translator [1], and Microsoft owns Bing, though MS Translator is a little different than Google Translate / Yandex Translate.
