Hash :
dec52006
Author :
Date :
2020-10-10T14:49:55
Map BCP 47 tags to all macrolanguages
The general rule is that if a BCP 47 macrolanguage maps to an OpenType
language system tag, all its individual languages map to it too.
Previously, a tag like "prs" (Dari) would not map to the language system
tag ('FAR ') of its macrolanguage ("fa") because "prs" already has its
own language system tag ('DRI '). That exception has been removed: now
"prs" maps to 'DRI ' and falls back to 'FAR '.