I've read through forum discussions/knowledge base now for an half hour or so and not gotten any wiser.

My understanding of the variable, <hw-thru> in the calloutformat.txt file is this:

If you define your hole to be up to next, you get a callout that says "THRU".  If your hole is defined to go through everything, you get THRU ALL.

Some people have edited their calloutformat.txt file so that the <hw-thru> variable is always, for example, THRU.  This means that regardless of how many walls the hole goes through, you will get a THRU text on the callout.

That would be fine an dandy except for the case where your hole does only penetrate a single wall.  Some enlightened souls have chosen "THRU ONE WALL", but are these enlightened ones manually editing the hole callout in the dimension properties panel, every time they have a hole going through a single wall?

Our desire is to have THRU ALL be "Genom" (a Swedish word for Through), and to have THRU be "Genom en vägg" (Through one wall).  I don't think it can be done automatically.