If two adjoining facets don't share a common first letter, then just concatenate them as they are.
If two adjoining facets have more than just the first letter in common (the first two letters, for example) then drop those first two letters when combing the facets.
You can use the Common Auxiliary schedules to specify place, date and language.
Citations and filing:
You must always follow the order of the facets.
The filing order is always general than specific.