Google Translate has made our lives easier by allowing us to translate the whole page in a single click. But there is still a huge void when it comes to typing in a specific language. Granted, there are a few tools to help you out with that, but nothing comes close to what Google Input Tools has to offer.
Google Input Tools lets you type in the language of your choice. Switch to typing in a different language with the click of the mouse, and switch back just as easily. The Google Input Tools extension provides virtual keyboards for over 90 languages, full IMEs or direct transliteration for over 30 different scripts, and handwriting input for over 40 languages.
When you first install the extension, click on the extension icon, then select “Extension Options” in the pop-up menu. A new tab will appear where you can select your preferred languages or input methods. The keyboards, IMEs or handwriting input you add to ‘Selected input tools’ can be enabled at any time from the extension itself. You can always return to this options page to add, remove, or change the order of your input tools.
Source - Google Input Tools