shell script to traverse all language pairs

lang_pair.sh

#!/bin/bash

function traverse(){
  lang_list=($1)
  ban=0
  for i in "${!lang_list[@]}"
  do
    ban=$((ban + 1))
    # echo "$ban"
    for j in "${!lang_list[@]}"
    do
      if ((j >= ban)); then
        echo "${lang_list[$i]}"-"${lang_list[$j]}"
      fi
    done
  done
}

# test
langs=(en de es fr hi pl)
traverse "${gats_langs[*]}"

exit 0