[tex-eplain] ngerman.sty does not work with TeX Live 2015

[Karl Berry]

Hi Helmut,

    on November, 19th, 2014 I have asked this already (for TeX Live
    2014) but either I've got no answer or I failed to archive the
    answer.

I replied asking for a complete input file (that I can run).  Input
starting with \DeclareTextSymbol is clearly not plain TeX :).
http://tug.org/pipermail/tex-eplain/2014-November/000884.html

(I'll send this from a different address in case my reply got
filtered somewhere ...)

Best,
Karl