The correct spelling for the word "more shortend" is actually "more shortened." The key to understanding the correct spelling is to break down the phonetics. "More" is pronounced as /mɔːr/ and "shortened" is pronounced as /ˈʃɔːtnd/. The -en ending of "shortened" is already an inflection that means the past tense of shorten, that's why it shouldn't end with -end. Correct spelling is important for effective communication, especially in academic and professional contexts.