::I've used underlining in this case because of the Cyrillic script. I've been reading and writing Cyrillic for longer than most people have been alive, so for me italicized Cyrillic presents no problem. However, italicized Cyrillic is difficult for anyone who is new or unaccustomed to it. We've already discussed this on Talk:Bulgarian_language, including possible solutions. Notice, for instance, how these Cyrillic letters appear in italics and other formats: вдигятопол, вдигятопол, вдигятопол, вдигятопол, вдигятопол. 
 ::We did the Bulgarian language page using italics at first, but the result was terrible ... and unreadible. You are welcome to do it a different way if you can think of a better one, but my opinion as a long-time professional typographer is that underlining is a vast improvement over italics in this case. 
 ::That other articles use Cyrillic italics does not strike me as valid argument. Any article intended to be read by people who do not regularly use Cyrillic should not use Cyrillic italics, unless it's a discussion about Cyrillic italics. All those other articles should be changed. —