Translating photo captions in terms of SEO – why is it important?

Nowadays, it is not easy to find a website with only text and without any graphics of images. Thanks to graphical elements, the content is more attractive and users are more eager to browse it; usually, graphical elements also contain additional information (e.g. diagrams or infographics), that are a supplement to an entry. This is why you should make sure that they can be received properly by any user.