Gallen or Gallein: How To spell?

The word Gallen is misspelled against Gallein, a noun meaning "A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids."

Word contains consecutive vowels 'EI' in between alphabets gall & n is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  gall-e-n 
Correct Spelling:  gall-ei-n 
Explore spell check of Gallein to spell without errors.