I have made a break-through! I have made hyphenationn work by just referring to latin1.tmac instead of koi8-r.tmac from ru.tmac. Can anyone explain me how and why it works?
With koi8-r.tmac I keep getting that "Special symbol" er- ror... > > I have found all the files: koi8-r.tmac, ru.tmac and > > hyphen.ru (in the koi8-r encoding). The koi8-r.tmac file > > consists of lines like: > > > > .trin \[char186]\[u2568] > > > > and I believe it maps UTF-8 to KOI8-R, hence I cocluded the > > input file should be in the UTF-8 encoding. > > > This is not correct. groff has a fixed set of built-in entities like > \[aq] or \[em] -- this list won't be changed any more. All other > entities get algorithmic names of the form \[uXXXX] and some other > forms based on the Adobe Glyph List conventions; please look this up > in the groff info manual if you are interested. It has *no relation* > to the used input encoding except the fact that such glyph names in > its simplest form are using the Unicode character code as part of its > name. > > Werner