Fields labels aren't translatable

The Geofield Lattitude/Longitude widget ("geofield_latlon") has two input fields, labeled "Latitude" and "Longitude" when editing its containing content type. These labels are not translatable.

When editing the field settings, its containing fieldset's title is translated though. (See screenshot, which contains a Dutch translation of the field settings)

At the moment I've not the knowledge to fix this and upload a patch (working on it!), so I can't yet provide the source of the issue and a patch.