There are letters that do not exist in Egyptian Language. Many people get mistaken and write words the way they are written in Arabic thinking that these words are borrowed from Arabic t0 Egyptian. Certainly, this is because of the Arabic Influence. Unfortunately, many people forget to Egyptianise these words.
Egyptian is written in Arabic Script as it is the most suitable writing system for it being an afroasiatic language.
Here are some rules for writing and to Egyptianise the words:
No letters ء ,ـئـ In Egyptian. It is Deleted or replaced with ي
What you pronounce is what you write except for letters ق , ج stays the same in words for the different accents in Egypt.
Notes on the alphabets:
The letter ي is alse a vowel and it is pronounced as (ea) is in eah ايه