Language code collisions in name table helper functions

[andrewsuzuki]

_MAC_LANGUAGES has multiple language IDs with the same IETF BCP 47 string: es (6 and 27) and ga (35 and 146).

_WINDOWS_LANGUAGES also: es (0x0C0A and 0x040A) and sms (0x203B and 0x1C3B).

These dicts are reversed into _MAC_LANGUAGE_CODES and _WINDOWS_LANGUAGE_CODES, so the string only refers to one of the two language IDs in each case, when used in findMultilingualName or addMultilingualName.

fonttools/Lib/fontTools/ttLib/tables/_n_a_m_e.py

Line 473 in 7e374c5

macLang = _MAC_LANGUAGE_CODES.get(language.lower())

Perhaps give a warning in these special cases?

[dscorbett]

According to the latest Windows language code list, 0x203B is sms-FI and 0x1C3B is sma-SE.