This is a simple Rule for Arkinventory that scan the Item Tooltip for ITEM_OPENABLE what is the Localized string from Blizzard.
For example in English this would be <Right Click to Open>
As of this is the Blizzard Localized String, this should work for all Languages... i hope ;)
Simply use: openable() in your Rule and it should work.
This AddOn REQUIRES Arkinventory to work!