Distinguishing COENG TA from COENG DA in Khmer script

[Richard Wordingham]

On Tue, 23 Jun 2020 15:50:27 -0700
Asmus Freytag via Unicode <unicode at unicode.org> wrote:

> The recommendation you cite is a bit "common sense". I believe,
> without actual knowledge, that there are no "dt" or "td" combinations
> only "dd" and "tt". In that case, a spell checker can help you
> pick the correct code for the subscript form.

Some SIL notes record ឧត្ដម /ʔut.ɗɑm/ ‘excellent’; the Pali/Sanskrit
word is _uttama_.  It makes me wonder if "td" is much commoner than
"tt" for series 1.

Richard.