Problem  

Affects Russian locales. 

The font quality is low for the Terminal application.

Solution  

Perform the following steps:  

1. Open a terminal, then choose Edit -> Profiles.

2. Click on the Edit icon.

3. In the General tabbed section, deselect the check box Use the same font as other applications.

4. Click on the font selection bar.

5. Choose a suitable font from the Choose a terminal font dialog.