=LOOKUP(1,0/(A1=SUBSTITUTE(TEXT(ROW($1:$12),"[dbnum1]")&"月","一十","十")),ROW($1:$12)&"月")
=VLOOKUP(LEFT(J2,LEN(J2)-1),{"一",1;"二",2;"三",3;"四",4;"五",5;"六",6;"七",7;"八",8;"九",9;"十",10;"十一",11;"十二",12},2,)&"月"
貌似没公式,有公式也是一样的使用替换的那个公式SUBSTITUTE 直接Ctrl+H 替换吧