Not everyone who visits your website understands your language. In this day and age, that is not going to keep people from visiting your pages as there are many translation tools around. Google already has a decent tool for this purpose. Thanks to BabelZ for WordPress, you can add its widget to your website fast.
The idea behind this plugin is simple. Install it to add a Google Translate widget to your website. You can choose which languages you would like to make available for translation. Three Google Translate Display modes are available. You have the option to automatically display a translation banner to users speaking languages other than the main one for your page. Simple but gets the job done.