@ltx Yes, that's what I said, and actually that's what I found this video for - I wanted to hear how much the basque pronunciation is affected by Spanish and this video clearly shows how much this is the case =D

@@mzleveli It's actually the opposite. Basque's 5-vowels-only based phonetic influenced the original Castillian speakers, since Basque was prior to the divergence of Latin into Spanish and it was neighboring to the area where Castillian was 1st documented.