You have an amazing number of special characters. But, 2 I see as missing–special Icelandic letters for “th”. One is the hard version (this), and the other is the soft version (thin). You have something similar to the former already, but it’s not quite right, if it’s supposed to be that letter. It’s properly done as a ‘d’ with the upright line curving over the circle, and with a line through it. The soft one is similar to about 1/4 of a circle representing the rising sun coming up over the horizon, represented by a line, then the whole turned up on end. Will they be added any time soon?
If you copy these characters from the wiki page, will they show fine inside document?
And could you copy these characters here as well, so we can know what you are talking about.
Would you mind deleting this question, since it is duplicate of that one: Missing special characters