2amigos CKEditor - use the specific font only

Hello!
I have a 2amigos CKEditor widget installed at my Yii2 site (I mean this one), and I want to allow my visitors to use only one font in it. For example, now user can select from some fonts when creating messages by CKEditor using the dropdown, but I want to remove all of them except one.
Is it possible?

If you have configured a font for the site for custom text in css or somewhere else you can disable font selection in the ckeditor config
https://ckeditor.com/latest/samples/toolbarconfigurator/#basic

Thank you!
Probably it’s possible to remove fonts right from the dropdown list? I mean from this one:


Let’s imagine I want to disable all list items except, for example, Arial.
Is it possible?