Things to know about Koasati
Koasati the language spoken by the Coushatta Tribe in Louisiana and the Alabama-Coushatta Tribe in Texas.
Typing Koasati Characters
Koasati is written in a variation of the Latin alphabet that includes several special characters. There are two methods for typing these characters.
The simplest method is to use the character suggestions. To do so, type one of the base characters listed below, then select the character you want from the set of special characters which appears.
Base characters for Koasati:
For a̱, the base character is a.
For i̱, the base character is i.
For o̱, the base character is o.
The other method is to use the virtual keyboard with the layout set to Koasati. (If necessary, you can change the layout by clicking 
and selecting an option in the Keyboard Language menu.)
Locate the character you want on the virtual keyboard, then click on it or press the corresponding key on your physical keyboard. The ̱ symbol is available by holding down Ctrl+Alt and pressing the 3 key, and should be typed after the letter to which it attaches. Capital letters and certain punctuation marks, such as the question mark, are available by holding down the Shift key.
See Typing Accents and Special Characters for details on both typing methods.