Word 2016 works normally when inputting English letters, but there is a delay when editing pinyin and deleting. I tried many methods, including cleaning the initial registry, cleaning the cache, removing the spell check, etc., but nothing solved it. Finally, I removed the unnecessary "add-ons". was later resolved. It can also be regarded as a cause of input delay. You can try it.
Steps:
My problem was caused by installing PowerDesigner. Just remove the check mark and it will be ok.
