There are many sounds in the Nuučaan̓uł (NuuChahNulth) that do not exist in the English Language. In order to ensure that these unique pronounciations are reflecting in written forms of the language the Nuučaan̓uł IPA font is used. Here is a link to languagegeek.com, follow the directions listed for either Mac or PC. The Nuučaan̓uł langauge is considered to be a part of the Wakashan language group which is why it is listed under 'Wakashan'.
Here is the Nuučaan̓uł Keymap pdf to use as a reference once you have dowloaded your font package.
To learn more about proper pronounciation and how to correctly use this font, the NuuChahnulth section of the firstvoices.ca website is a great resource.