 Thus, the Q-value or communication value is the product of the prevalence formula_3 and the centrality formula_6 of language "i" in constellation "S".Consequently, a peripheral language has a low Q-value and the Q-values increase along the sociology classification of languages, with the Q-value of the hypercentral language being the highest.De Swaan has been calculating the Q-values of the official European Union(EU) languages since 1957 to explain the acquisition of languages by EU citizens in different phases.