In the Canary Islands, the Spanish Atlantic regional lexicon shows resemblance to the lexicon from Andalusia and west mainland Spain. This shared vocabulary is a result of the common history of these varieties since the sixteenth century. This research aims at finding Spanish Atlantic common vocabulary, a superdialect understood as encompassing the Spanish of Spain and America, from which we have no numerical data. Canarian Spanish shows many common Hispanic voices from all the different areas and becomes a case study. The research is designed with a quantitative methodology applied to a corpus formed by different dialect dictionaries. The results show evidence of a Koine in several stages through the analysis of shared voices and the verification that Andalusian Spanish has not been the only means of dissemination.