We mapped the available glyphs and accents for the Amis language.
The letters in alphabetical order:
a c d f ng h i k l m n o p r s t u w y
Everyone of them can get an acute or circumflex accent on top. ng can get a dot on top of the g.
The accents are literally on top: i would get the dot PLUS the accent on top.
Not all accented characters directly exist in Unicode; however Unicode developed various kinds of combination features to take care of these cases.
Then we need an input method that would insert ng instead of g and allow to type all the accent combinations.
Here is the full character set:
a á â c ć ĉ d d́ d̂ f f́ f̂ ng nǵ nĝ nġ h h́ ĥ i i̇́ i̇̂ k ḱ k̂ l ĺ l̂ m ḿ m̂ n ń n̂ o ó ô p ṕ p̂ r ŕ r̂ s ś ŝ t t́ t̂ u ú û w ẃ ŵ y ý ŷ
Update: this character list has been improved and the good version is found in the Debian wiki.
The list is not displayed correctly with many fonts or rendering engines. Arne made a test page that explicitly sets a font that works.
The accents are not taken into account when sorting.
Uppercase letters are not used.
Note: the page has been updated to reflect further input from Unicode and Amis people.
Update: there is now a wiki page on the Debian wiki.