The status of Ongoing or Complete are simply meant to convey the status of the series on Batoto, not the scanlation status. The game could be completely scanlated but not uploaded to Batoto and the status would remain "Ongoing".
As such, a "Hiatus" status wouldn't really make sense.
Why wouldn't it? I did pointed it out earlier that it's to describe status that's neither "complete" or "ongoing" on Batoto. Do you have anything better in mind?