aqile it is true now a days people are coming up with new Harari language that we have never heard of before. Normally languages evolves from time to time and linguistices study the new word its origin, spelling, pronounciation and its proper use then they documente it. what we are experiancing now is individuals throw words and claim that is Harari language. If we get back to your question the word "Kum Aama" its meaning in English is "Millennium" and this word is a combine word "Kum" that is 1000 and Aama is year so it is 1000year.
Nigat