#!/bin/bash

translated="$(curl -s \
    http://localhost:9000/translate \
    -H 'Content-Type: text/html' \
    --data-binary @- -o- < <(sed 's,^fix:,доза:,' < "$1") | \
        tail -n +2 | \
        perl -pe 's,<SPAN CLASS=UNKNOWN_WORD>(.*?)</SPAN>,\1,g')"

[ -n "$translated" ] && echo "$translated" > "$1"