Writen or Written: How To spell?
The word Writen is misspelled against Written, which is past perfect of "Write"
Written has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings wri & en which should not be misspelled with single 'T'
Wrong Spelling:  wri-t-en  Correct Spelling:  wri-tt-en 
Find more wrongly spelled words of Written to spell it well.