Generally, it is not possible to translate English novels in MOBI format online. You can try searching for "MOBI to PDF converter" online or using download tools to find a suitable conversion tool. Input "MOBI online converter" into the search bar and download it to your desktop. Once installed, open the converter software and navigate to the "E-book Format Conversion" option on the left side. Click on it to access the five subcategories, where you can select the language you wish to translate to.