I have a site related to poems.i want to give the members option to write hindi or english or transformer.

for example if any one know hindi language then he select the language from option and start writing hindi

if any one want to write in english then he select the english from combo to write english.

if any one is write hindi and wan to write some sentense in english the have a option to activate transformer

i have currently transformer work well but how i make a combo and selet language from it and start writing.