Ah yes, the cedillas; now these are ambiguous! What is the "correct form" for cedillas under N, K, L, R, S and T? What should these look like? The fonts I've seen disagree on all of them: some have commas, others have "real" cedillas. Since Unicode 3.0 came out with its new code points 0218..021B (S and T with comma below), it has been my conviction that 015E..015F and 0162..0163 should look like S and T with real cedillas. Am I wrong in that assumption? Even some fonts which have, for instance, 021A (T with comma below) defined, make 0162 (T with cedilla) look like a T with an under comma. Now I must admit, I haven't come across many texts which used Ts with cedillas. Not in printed form, that is; the only ones I have seen were in electronic form, where their appearance depends on the font used.
Okay, here we go...
K, L, N, R with comma* below for Latvian
*Note that this doesn't mean use the comma glyph, which is usually too large; the characteristic of this mark is that it may resemble a comma, but definitely is not attached to the base glyph and has a perceivable curve.
S with cedilla below for Turkish (and some other Turkic languages)
S, T with comma* below for Romanian
As John Cowan points out, the T with cedilla is not used for any language, although I think a case could be made that it could be used for Gagauz Turkish because their current Latin orthography, which uses S with cedilla and T with comma, looks really weird.
The most problematical part of this is that 8-bit codepages supporting Romanian use the old S and T with *cedilla* codepoints, not the new S and T with comma codepoints. We resolve this in OpenType fonts by use the Localised Forms <locl> layout feature to substitute the S and T with comma glyphs for the default S and T with cedilla glyphs, so that documents created using the former characters for Romanian will display correctly. This is not supported in applications yet, but will be soon.
John Hudson
Tiro Typeworks www.tiro.com Vancouver, BC [EMAIL PROTECTED]
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