What fonts need to be replaced/updated in Android 4.1?

Question

Android

In some applications for Android fonts began to be distorted.
Example:

I.e. Cyrillic and Latin characters look different, some characters (і, ї, є) are not displayed, some emoji emoticons are not displayed.
How to determine which fonts need to be updated and where to get them?
Phone: Lenovo P770, Android 4.1 stock. root.
Fonts that are currently in /system/fonts
It would be nice to find some way to scan and update versions of all the same fonts but later versions.