Non-standard Latin accented characters aren’t saved to the database when you enter/cut-and-paste it into an Ultranet editor window. However, this feature can be enabled by an Administrator:
Go to Administration > General Config.
Under the Page Details section, there is an item called “Editor in Unicode Mode:”, which is set to ‘False’ by default.
Click “Edit” and change this value to ‘True’, then hit “Update”.
You will now be able to enter in other international character sets (e.g. Japanese, Chinese, Arabic or macrons for Te Reo Māori) without them converting to question marks or boxes.