A family of Microsoft word processing software products for creating web, email, and print documents.
The article https://www.edanzediting.com/resources/word-processing-tips-and-tricks-manuscript-appearance-snap-grid shows where to look for the option to turn off the snap to grid.
Trying this out, I found that the option appears in the Font > Advanced dialog only if an Asian language is active on the computer. In Windows, that means going to the Region & Languages page in the Settings (Windows 10) or the Languages page in the Control Panel (earlier Windows) and adding an Asian language. After the option is turned off, you can go back and remove the language from Windows. Mac users will probably have a similar task.