When designing a website, it’s easy to forget about users from other countries who may want to view your website in another language by translating it with, say, Google Translate. That’s why, it’s best to design your pages in such a way that when text becomes longer or shorter, your pages won’t break. Usually your content area is safe. But, your header and navigation areas can easily break if you design them to be fixed width.
Tip: always use flexible width for text that may expand or collapse when translated into a different language.