Externaly or Externally: How To spell?
The word Externaly is misspelled against Externally, an adverb meaning "In an external manner; outwardly; on the outside; in appearance; visibly."
Externally has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings externa & y which should not be misspelled with single 'L'
Wrong Spelling:  externa-l-y  Correct Spelling:  externa-ll-y 
Explore spell check of Externally to spell without errors.