The aim of this article is to present and review the research methods employed in Laura Gago Gómez’s recent study, Aproximación a la situación sociolingüística de Tánger-Arcila: variación léxica y grafemática (2018). Moreover, this article intends to evaluate the possibility of applying the methods of Hispanic research on lexical availability to Middle Arabic texts, after considering what kind of Middle Arabic texts should be taken into account for this purpose.