Japanese has an easy sound system but a bewildering grammar. Chinese has a simple grammar but thousands of characters. Latin verbs are conjugated in a seemingly endless variety of ways.
儘管語言沒有「綜合」起來特別難的，但卻各自有不同的難處，像日文的發音單純，但文法繁雜；中文沒什麼文法，但筆畫、字義很多；拉丁語系的語言動詞變化特多等均是。