It is likely impossible to quantify the evolution of human language, for the evolutionary process is a continuous one, rather than discrete. In this respect, “linguistic speciation” shares an inherent continuousity with biological evolution. Neither a “species” or a “language” is a fixed entity, but an adaptive moment amidst constant change. Along these same lines, I wonder, how long does it take for an “invasive” species or an immigrant to become “native” following its arrival? Naturalization is likewise a continuous process. My point here is that these threshold distinctions, “language,” “species,” “native,” are made arbitrarily, likely for the purpose of maintaining and reinforcing the power relations of the distinguisher.