In /usr/bin/po2debconf line 23:
: ${PODEBCONF_LIB=/usr/share/intltool-debian}
  ^-- SC2223: This default assignment may cause DoS due to globbing. Quote it.


In /usr/bin/po2debconf line 24:
: ${PODEBCONF_ENCODINGS=/usr/share/po-debconf/encodings}
  ^-- SC2223: This default assignment may cause DoS due to globbing. Quote it.


In /usr/bin/po2debconf line 49:
        optarg=`expr "x$option" : 'x[^=]*=\(.*\)'`
               ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        optarg=$(expr "x$option" : 'x[^=]*=\(.*\)')


In /usr/bin/po2debconf line 138:
[ -n "$podir" ] || podir=`dirname $origfile`/po
                         ^-----------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.
                                  ^-------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
[ -n "$podir" ] || podir=$(dirname "$origfile")/po


In /usr/bin/po2debconf line 146:
        outputformat=`sed -e 1q "$podir/output" | awk '{printf "%s", $1}'`
                     ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        outputformat=$(sed -e 1q "$podir/output" | awk '{printf "%s", $1}')


In /usr/bin/po2debconf line 148:
        outputencoding=`sed -e 1q "$podir/output" | awk '{printf "%s", $2}'`
                       ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        outputencoding=$(sed -e 1q "$podir/output" | awk '{printf "%s", $2}')


In /usr/bin/po2debconf line 200:
        outdir=`mktemp -t -d po2debconf.XXXXXXXXXX` || {
               ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        outdir=$(mktemp -t -d po2debconf.XXXXXXXXXX) || {


In /usr/bin/po2debconf line 204:
        tmpfile=`mktemp -t po2debconf.XXXXXXXXXX` || {
                ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        tmpfile=$(mktemp -t po2debconf.XXXXXXXXXX) || {


In /usr/bin/po2debconf line 208:
        for f in $podir/*.po
                 ^----^ SC2231: Quote expansions in this for loop glob to prevent wordsplitting, e.g. "$dir"/*.txt .


In /usr/bin/po2debconf line 211:
                l=`echo $f | sed -e 's/.*\///' -e 's/\.po$//'`
                  ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.
                        ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
                l=$(echo "$f" | sed -e 's/.*\///' -e 's/\.po$//')


In /usr/bin/po2debconf line 212:
                encto=`grep "^$l[ 	]" "$PODEBCONF_ENCODINGS" | sed -e "s/^$l[ 	][ 	]*//" -e 1q`
                      ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.
                              ^-- SC1087: Use braces when expanding arrays, e.g. ${array[idx]} (or ${var}[.. to quiet).
                                                                               ^-- SC1087: Use braces when expanding arrays, e.g. ${array[idx]} (or ${var}[.. to quiet).

Did you mean: 
                encto=$(grep "^$l[ 	]" "$PODEBCONF_ENCODINGS" | sed -e "s/^$l[ 	][ 	]*//" -e 1q)


In /usr/bin/po2debconf line 230:
        outfile=`mktemp -t po2debconf.XXXXXXXXXX` || {
                ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        outfile=$(mktemp -t po2debconf.XXXXXXXXXX) || {


In /usr/bin/po2debconf line 252:
$PODEBCONF_LIB/intltool-merge $quiet --rfc822deb-style $utf8 $podir $origfile $outfile 1>&2 || exit 1
                              ^----^ SC2086: Double quote to prevent globbing and word splitting.
                                                             ^----^ SC2086: Double quote to prevent globbing and word splitting.
                                                                    ^-------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                              ^------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
$PODEBCONF_LIB/intltool-merge "$quiet" --rfc822deb-style $utf8 "$podir" "$origfile" "$outfile" 1>&2 || exit 1


In /usr/bin/po2debconf line 255:
        tmpfile=`mktemp -t po2debconf.XXXXXXXXXX` || {
                ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
        tmpfile=$(mktemp -t po2debconf.XXXXXXXXXX) || {


In /usr/bin/po2debconf line 259:
        sed -e 's/^\([^ 	:]*\)\.[^ 	:]*:/\1:/' $outfile > $tmpfile && mv -f $tmpfile $outfile
                                                           ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                      ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                                        ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                                                 ^------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
        sed -e 's/^\([^ 	:]*\)\.[^ 	:]*:/\1:/' "$outfile" > "$tmpfile" && mv -f "$tmpfile" "$outfile"


In /usr/bin/po2debconf line 262:
tmpfile=`mktemp -t po2debconf.XXXXXXXXXX` || {
        ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
tmpfile=$(mktemp -t po2debconf.XXXXXXXXXX) || {


In /usr/bin/po2debconf line 266:
sed -e 's/^DefaultChoice/Default/' $outfile > $tmpfile && mv -f $tmpfile $outfile
                                   ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                              ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                         ^------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
sed -e 's/^DefaultChoice/Default/' "$outfile" > "$tmpfile" && mv -f "$tmpfile" "$outfile"

For more information:
  https://www.shellcheck.net/wiki/SC1087 -- Use braces when expanding arrays,...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2223 -- This default assignment may cause...