It is generally accepted that institutionalizing equates to make something official and stable. We can also consider that it implies an evolution from conviction to responsibility, from imagination to rationality. More than forty years after independence, facts and figures reveal that the Commonwealth of Dominica and other creole-speaking small islands states invest in their creoleness in order to assert themselves and grasp the historical challenge of post-colonial development. Creole culture and language considered as a cultural heritage is above all an economic asset for those small island developing states (SIDS) which, very often, can only benefit from their cultural heritage. What are the concerns behind an institutionalization of the creole language in Dominica? Beyond the challenge for the preservation and promotion of an intangible cultural heritage, it is necessary to know if this approach of the creole language will not result in a vain identity illusion. In a post-colonial context, we may also wonder if this project comes within the scope of the social and economic requirements of a human sustainable development demanded by the Dominicans.