\enableregime[utf]

% \definetypeface [russian]
%   [rm] [serif] [computer-modern] [default] [encoding=t2a]
%
% \setupbodyfont[russian]

\starttext

\startbuffer
Мама и Папа % Some russian characters
\stopbuffer

\chardef\utfunicodetracer=0 \blank \getbuffer \blank
\chardef\utfunicodetracer=2 \blank \getbuffer \blank
\chardef\utfunicodetracer=7 \blank \getbuffer \blank

\stoptext
