<link href='http://fonts.googleapis.com/css?family=Lato:100' rel='stylesheet' type='text/css'>
<style>
p{font-family:Lato, serif; font-weight: 100; font-size:140%;}
</style>
<p>
We would like to eat now.<br>
Nous voudrions manger maintenant.
</p>
The first line loads Lato font with 100 point "weight". You can choose higher weights such as to make the font thicker or choose to load several weights, ie Lato:100,300
In between the style tags, you set the paragraph style to Lato, choosing serif as a fallback if Lato is not available due to an old browser.
To test the code, copy all lines at the top of the page into an html file and open it in a browser. The code above is running at http://travelphrase.com/font-test.html
A complete list of google fonts can be found at https://www.google.com/fonts