As you mentioned Quran is not read like Arabs speak in Arabic. Quran absolutely has rules how to recite it and it is called 'Tajweed'. One must recite Quran following the rules of Tajweed. It makes your recitation more beautiful. If you don't recite it without Tajweed it's meaning might change.
Allah says in the Quran,
"Or add to it, and recite the Qur'...
It seems to me that you are neither an Arabic speaker nor have a basic level in understanding Arabic. As what you suggest would rotate an Arabic linguist in his grave if he could. Let me explain your inquiry with a focus on the linguistic part of the question:
Your Example from surat al-Zalzala (99)
Al-Zalazala or al-Zalzalah (both actually are examples of ...
I just opened the Quran on my phone and I see after the 'ha' there is an silent Alif or 'Laam'(Not 100% sure). Anyway the ending letter becomes that Alif so reading the 'ha' is correct.
In some other ayas there is a silent 'ya' at the end.