Vanilla is a product of Lussumo:
Documentation and Support.
The target of Geschwind’s analysis was FOXP2, a gene that rose to scientific prominence during the study of a London-based family afflicted by hereditary speech disorders. Of the extended family’s 30 members, one-half have severe linguistic deficiencies, as well as a FOXP2 mutation. Those who don’t have the mutation are able to speak normally.