in 12th science hsc board pcmb marks are important or overall percentage of 12 stdis important.in hsc marksheet percentage ofpcmb marks will display or overall percentage of all subjects including languages will display

@ xavier 
everything will be display alongwith the language subjects , and obviously the whole study will be important . and it will also help u in future , also in entrance exam , and we take pcmb as important beacuse they will appear in enmtrance exams , but that doesnot means that one can ignore the language subjects . 
these language subject will gng to problem you upto 12^th , not ater that , so, dnt worry , just study them as for now . 
ALL THE BEST ..