On Wed, Sep 15, 2010 at 5:18 PM, Michael Everson <everson at evertype.com> wrote: > Doug might propose a Ewellic script tag here, mightn't he? In fact no. The assumption is that ISO 15924/RA can act in all such cases. It *is* possible for us to create primary language subtags, but only if ISO 639/RA has failed to act.