contactMotherTongue constant
IriTerm
const contactMotherTongue
motherTongue from contact vocabulary [Expects: http://www.w3.org/2000/10/swap/pim/contact#LanguageCode]
Can be used on: http://www.w3.org/2000/10/swap/pim/contact#Person
Implementation
static const contactMotherTongue = IriTerm(
'http://www.w3.org/2000/10/swap/pim/contact#motherTongue',
);