Improvisatore or Improvvisatore: How To spell?
The word Improvisatore is misspelled against Improvvisatore, a noun meaning "One who composes and sings or recites rhymes and short poems extemporaneously."
Improvvisatore has double "vv" is mispronounced as "v"Remember double 'VV' in between the strings impro & isatore which should not be misspelled with single 'V'
Wrong Spelling:  impro-v-isatore  Correct Spelling:  impro-vv-isatore 
Find more incorrect spellings of Improvvisatore to spell right way.