Auto Passing a "q" before a Y on a command line

The q keypress serves as a quit signal for the pager less, which is explicitly used by the script:

read FOO
echo "$licensetxt" | less
while true
do
  MS_Printf "Please type y to accept, n otherwise: "
  read yn
  if test x"$yn" = xn; then
    keep=n
eval $finish; exit 1
    break;
  elif test x"$yn" = xy; then
    break;
  fi
done

And man less says:

Options are also taken from the environment variable "LESS".

Set this environment variable as follows:

printf '\ny\n' | LESS='+q' ./TeamSpeak3-Client-linux_amd64-3.0.19.4.run

_{Solution taken from @steeldriver's comment and added according to the law of @JamesTheAwesomeDude.}