8. A system comprising: one or more computing devices configured to perform operations including: receiving a user request to translate a source document from a first language text to a second language text; obtaining a translated document containing a translation of the source document into the second language text; formatting, using the one or more processors, the translated document based on the second language; presenting the translated document, wherein the formatting is used to present the translated document; and presenting the first language text that corresponds to a portion of the translated document in a graphical element overlaying the translated document in response to a user input pointing to the portion of the translated document.
11. The system of claim 8 , wherein formatting the translated document based on the second language comprises formatting the translated document to read from right-to-left when the second language is read right-to-left.