Can you specify the typeface the site uses as a substitute for missing glyphs?

[Alex HH]

Can you specify the typeface the site uses as a substitute for glyphs missing in the default typeface? The typeface I'm using has a limited number of extra characters, not great, especially for Finnish/Swedish texts. At the moment it swaps out the missing letters for what looks like Times. Is it possible to designate a specific typeface (that would draw less attention) for it to use in these instances?

[arminunruh]

maybe

if you go to textformats

you see theres "html class"

the class here is

._test3{

}

so use custom css:

._test3{
font-family: yourfontname, another-fontname, sans-serif;
}

maybe that works, not sure
i think this won't work ^^