“…The study of the impact of diglossia, namely the linguistic distance between SpA and StA on language and literacy development is scarce. Yet, it is receiving increasing attention, especially within the framework of comparative linguality and its effect on language development and metalinguistic skills in bilingual and bilectal children (Rowe and Grohmann, 2013 , 2014 ; Grohmann and Kambanaros, 2016 ; Grohmann et al, 2016 ). With focus on literacy development, Saiegh-Haddad and colleagues (Saiegh-Haddad, 2003 , 2004 , 2005 , 2007 ; Saiegh-Haddad et al, 2011 ; Saiegh-Haddad and Schiff, 2016 ; Schiff and Saiegh-Haddad, 2017 ) tested the impact of the linguistic distance between Spoken and Standard Arabic on the development of literacy-related skills in Standard Arabic, including phonological awareness, pseudo word decoding, and word reading.…”