If you want to quickly translate a web page or section of a page to your language, the Firefox extension ‘Translate This’ can help you. This restartless add-on uses Google Translate service for translating the web pages and quite easy to use.
After installing the add-on, just click the Translate button in your add-on bar or use the shortcut key Ctrl + Alt + T (default setting) to translate the entire page.
For a section of a page, select the text you want to translate, right click and choose “Translate This – Selection” option.
You can change your language and shortcut key from the configuration window. Right click on the Translate button to bring up the Settings panel and make changes.