build a font for your endangered language...

[William J Poser]

To get a character added to Unicode  you need to submit a proposal
to the Unicode Consortium. Their web site is: http://www.unicode.org.
The crucial thing is that you must be able to show that the character
is or has been in actual use. If you are designing a new writing system
and are creating new characters, Unicode will not encode them right away.
You'll have to start using them first.

Now, this may seem like Catch-22: how can you use them before Unicode
encodes them? Are you forced to use a nasty idiosyncratic encoding?
Well, not exactly. Unicode includes several sets of codepoints called
"Private Use Area"s. These are guaranteed never to be used for official
Unicode purposes. Programs that process Unicode text can use them for
internal purposes, and you can use them for characters that have not yet
been officially encoded.

But, turning to your specific need, when you say you need <n> with a </>
over it, do you need a real slash or will an acute accent do? <n>
with acute accent is already available. It is U+0144 in lower case,
U+0143 in upper case. (U+XXXX is the notation used by the Unicode
consortium. XXXX is the codepoint in hexadecimal. So these are characters
344 and 343 in decimal.) Or when you say over do you mean not "above" but
"through", that is, "n with a slash through it"?

Bill