A typically Gascon feature that may arise from this substrate is the change from "f" to "h". Where a word originally began with in Latin, such as festa 'party/feast', this sound was weakened to aspirated and then, in some areas, lost altogether; according to the substrate theory, this is due to the Basque dialects' lack of an equivalent phoneme, causing Gascon hèsta or . A similar change took place in Spanish. Thus, Latin facere gives Spanish hacer () (or, in some parts of southwestern Andalusia, ).A. R. Almodóvar: Abecedario andaluz , Ediciones Mágina. Barcelona, 2002 Another phonological effect resulting from the Basque substrate may have been Gascon's reluctance to pronounce a at the beginning of words, resolved by means of a prothetical vowel.
a typically gascon feature that may arise from this substrate is the change from "f" to "h" where a word originally began with in latin such as festa 'party/feast' this sound was weakened to aspirated and then in some areas lost altogether; according to the substrate theory this is due to the basque dialects' lack of an equivalent phoneme causing gascon hèsta or  a similar change took place in spanish thus latin facere gives spanish hacer () (or in some parts of southwestern andalusia )a r almodóvar abecedario andaluz  ediciones mágina barcelona 2002 another phonological effect resulting from the basque substrate may have been gascon's reluctance to pronounce a at the beginning of words resolved by means of a prothetical vowel