It is not translatable "Dialog-information.png".
Entry affected at this page is the fourth or better Applications/Education/17
Ah - you mean that you want "Information" to be replaced by your language? The way to do that is to go to http://userbase.kde.org/index.php?title=Template:Info&action=edit and copy the code. Then start a new page called Template:Info/ca, paste in the code and edit the heading. You now have a template for your future needs. You can do the same for any of the box templates which you'll find listed at User:Annew/Snippets#Boxes
Template:Info/ca created. Very well but I can not reference the translation (or called this template) because it is a special template. Included inside all content of the entry.
Only translate, not to edit the primary source (in english).
Proposed changes for Applications/Education/17:
After (into my language translated version):