t-merz

> Referring to the Microsoft Opentype 'cmap' documentation at https://docs.microsoft.com/en-us/typography/opentype/spec/cmap: > > Clause "9.6.5.4 Encodings for TrueType fonts" in ISO 32000-2:2020 makes explicit reference to various values for _platform-specific encoding...

ISO 639-1 allows only two-letter codes, while BCP-47 additionally allows three-letter codes according to ISO 639-2 (plus other things). > Yes, the restriction is intentional and was primarily an attempt...

> @t-merz it's entirely about backwards compatibility, since 32K-1 (and earlier) only supported two byte escape codes. Huh? ISO 32000-2 cannot introduce something new because it wasn't supported in ISO...

> ISO 32000-2, 7.9.2.2.2 "Text string language escape sequences" contains the following text after NOTE 1: > > > The escape sequence shall consist of the following elements, in order:...