OCR languages: what’s the point of the combined-languages options, e.g. Japanese and English?

ABBYY provided combined languages in older versions of their OCR, these were removed in ABBYY v12. DT3 will still support these by converting them to a primary and secondary language, i.e.

Selected Language: Japanese and English
Primary: Japanese
Secondary: English

The only time this is not the case is if you are running on macOS 10.11 where DT will use ABBYY v11.