Using foreign characters in a tooltip

[Othesus]

I'm trying to make a custom version of my examine window with a button that searches a Russian site. The tooltip for the button would be
LocalTooltip="Поиск на eq2.playhard.ru"

When I tried that on my US server the characters just looked like boxes but I thought that might just be because the font didn't include those characters. Does the tooltip need to be
LocalTooltip="\rc:Поиск на\:Seach\/r eq2.playhard.ru"
or do you use some other method like forcing a different font with some custom tooltip style?