About the inyan of davka ksav ashuris or even other languages. The Mishna Berura in 340, 22 says That lehalacha we do not pasken like the or zarua and ksav in another languege is chayav (brought down like the rama). He brings the rambam in Peirush Hamishnayos that says even two simanim not in any language is chayav. The Biur HAlachah in 306 11 DH Biksav Shelahem and in the Mishna berura over there siif 47 that the or zarua is a daaas yochid and all the rishonim argue and the ikar is like the other rishonim ayin shum barichus.
LMaaseh learning the mechaber over there is very confusing if you do not hold like this rama. because the mechaber in 306 11 says ???? ????? ??? ???? ????? ?? ????? ????? ????, ????? ????? ??????? and on this the rama says davka if you sign in ksav shelahem which is an issur derabanan which is muttar for yishuv eretz yisrael. on this the aruch hashulchan says really the mechaber is a taus sofer and should say ?? ???? ????: ‘???? ?????? ??? ???? ????? ?? ????? ????? ???? ????? ????? ?????, ????? ???????’, ??? ??? ????? ????? ?????”? ??.
???? ????? ????? ??? ????, ???? ??? ????? ????? ????? ???? ?????, ?????? ???? ????, ??”? ????”? ???? ?”? ??? ?’, ??? ?????: “?????? ??? ??? ???? ???? – ????” ?”?, ??? ???????? ???? ??. ?????? ???? ??, ???? ????? ???? ?????? ????, ??”? ????? ?”?.
And then aruch hashulchan says that the rama should be erased vzeh leshono ????”? ???? ????? ?? ????? ???? ???? ???? ??? ?????? ?”?. ????? ??? ?????? ?? ??????, ???? ?? ??????? ???? ??? ?????????? ?????, ???? ??? ??? ???? ???? ??”? ???? ??, ??? ??? ???”? ???? ????? ?”? ??”?, ??? ????? ??? ??? ?”?, ?????? ?? ??? ?? ??? ???”?, ???? ???? ????? ?”?. ??”? ????? ????? ???? ??? ?????? – ?????? ?? ?????? ????? ????? ??”? ??”? ??, ??? ??? ??”? ???”?
Just to note this aruch hashulchan is one of the three places where he brings down the mishna berurah