Text that appears to be “hard-coded” on pages throughout your store can be instantly changed to a different language by changing the locale of the view. Changing the locale doesn’t actually translate the text word-for-word, but simply references a different translation table that provides the text used throughout the store. The interface text that is changed includes titles, navigation, labels, buttons, and links such as “My Cart” and “My Account.”
After changing the locale, you must still translate the product descriptions and categories in your catalog, as well as any CMS pages, blocks, banners, and polls that you have created.
After changing the locale, you can use the Theme Text Editor to make “spot changes” to any text in the interface.