Translating Images & URLs
Images or links on your site can be replaced with their translated counterpart the same way that you translate a normal phrase in SiteTran.
Phrase Discovery doesn't add <img src> and <a href> values by default. Turn on Discover URLs in Settings > Phrase Discovery if you want those URLs added automatically. Even then, data: and blob: URLs are skipped unless you set sitetran.data_uri_discovery_enabled = true in your widget snippet, and javascript: URLs are never discovered. Read more in Widget Initialization Options.
Adding the source link
Add your image's src value or link's href value into a pagedoc, make sure to add them to different lines.
Translating
Once they're added you can translate the URL of the image or link as you would any other phrase.
Note: Make sure the URL of the image or link that you use in your translation exists and is live on your server, CDN, S3, or wherever you normally keep your images.