Rechstag or Reichstag: How To spell?

The word Rechstag is misspelled against Reichstag, a noun meaning "The Diet, or House of Representatives, of the German empire, which is composed of members elected for a term of three years by the direct vote of the people. See Bundesrath."

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