The problem for the Medieval Spanish scholars who were tasked with translating this material is that the letter sheen and the word shayun can't be rendered into Spanish because Spanish doesn't have that SH, that "sh" sound.
Problemet for de middelalderlige spanske lærde, som havde til opgave at oversætte dette materiale, er, at bogstavet SHeen og ordet shalan ikke kan blive skrevet på spansk, fordi spansk ikke har SH, denne "sh" lyd.