Please test, translate and give feedback.
To translate the app: See the /system/apps/UBLViewer/local for an example. Send me the textfile and I will add the translation to the package.
Updated to 0.62-2
UBL Viewer for Haiku will always be the PRO version. No need to register in Haiku.
XML and Text view. Possible to Remove/replace PDF. Basic editing of UBL.
I saw in the screenshot there was no icon, just suggesting adding one. It is usually easier to add the icon in the recipe when using haikuporter than adapt the application build system.
Next free time will be spend on trying to make a recipe so I can add it to Haikuports. In the mean time the first link is still available (and updated)