changing joomla component content

i am new in "joomla" and php

i have been installed a free "joomla" component and i want to edit that component relative module content

for example i want to change button writing from (for example) "vote" to word in my language like "رای دادن" also i want to remove some unnecessary lines

i can do my change with inspector but i cant find and change source i have search all my site for that my content is in it with dream weaver but its not find anything

i want to know where that component contents come from and how can i change it

thanks.