Ultima Online can use the Unicode character set. To activate this option enter these two lines into your UO.CFG file:
Once you do this you are able to use all kinds of characters with diacritical marks plus a whole range of special characters. Some characters can be entered directly from the keyboard if your keyboard supports it. Other characters can only be entered by holding down the [Alt] key and typing a number on the numerical keypad on your keyboard. As an example part of the Latin-1 character set has been displayed here. Make sure that you type all 4 numbers of each character. 191 is not the same as 0191. Here are some more characters which are not in the table:
[Alt]+025220 gives (lower double quote)
[Alt]+025222 gives (which looks like a cross or a sword)
Please note that these characters can only be used in spoken text, you cannot for instance use these in guild titles or abbreviations.