Scripted translations

In the Custom_Captions table there are columns for Japanese (Capt_JP) and Chinese (Capt_CS) translations.  Only Japanese is included in the standard Translations editing screen.  If I add text for the Japanese (or Chinese) language, however, it doesn't get scripted out by the component manager.

Is this another CRM limitation?  Or is there a way to include Japanese translations in components?

I don't actually need Japanese translations - I need to add extra info about the translations (specifically selection field options) to use in additional processing and the Capt_JP field won't be used for actual translations.  I tried the Capt_Context field too but that doesn't get scripted either.