Cyrillic fonts (Russian)

Hi folks!
How are you doing?
I have to make one comment on this subject:
the cyrillic fonts (Russian) are not displayed properly on the boards of this E@H project.
I created long time ago my profile page on this project and all went fine, but some months ago I realized that something had changed: some cyrillic fonts are not shown, making it unpleasant to read to those who read Russian and for those who do not have any idea of what cyrillic means......
Well, I was hoping to contact you and find out why this has happened. I was wondering whether there was a bug/failure in some fonts folder. Something has happened during the last year, maybe an upgrade of the E@h version that changed something.
I am not aware of having changed anything at all in my own PC preferences or settings to make this happen.
I will appreciate any opinions on this.
It is not fair when you cannot use the language you chose to express yourself.
Thanks again!