English remains the single most widely used language online. But it still only accounts for around a quarter of total usage, and this proportion is falling. The growth in online use of languages such as Chinese and Arabic far outstrips that of English. Additionally, many users only speak English as a second language. A recent study conducted across the European Union found that more than half of Internet users visited foreign language (usually meaning English) websites. However, only 18 percent said they would make online purchases from a site that wasn't in their own native language. The benefits of website localization are increasingly widely recognized. Although SEO should be an important part of any online marketing…