Multi server launcher bash script

#!/bin/bash
t0='cs2d'
t1='The game server'
t2='create'
t3='terminate'
t4='_dedicated'
t5=' '$t2'd'
t6=' '$t3'd'
t7='with corresponding pattern "'
t8=' has been'
t9='Invalid input arguments. [Error Code: '
t10=$t1'(s) '$t7
s=$t0'_username_'
o=/dev/null
g=/usr/games/
d=$g$s$2/
e=echo
k=kill
if [ "$1" == "$t2" ] && [ -n "$2" ]; then
    if [ -d "$d" ]; then
        nohup $d$t0$t4 > $o 2>&1 &
        $e $t1$t8$t5.
    elif [ ! -d "$d" ]; then
        $e "Directory \"$2\" does not exist!"
    else
        $e $t9"3]"
    fi
elif [ "$1" == "$t3" ] && [ -n "$2" ] || [ -n "$3" ]; then
    if [ "$3" == "match" ] || [ "$3" == "name" ]; then
        p$k -f $2/$t0$t4
        $e $t10$2\"$t8$t6.
    elif [ "$3" == "all" ] || [ "$3" == "any" ]; then
        $k -p -s 9 `pidof $t0$t4`
        $e $t10$t0$t4\"$t8$t6.
    else
        $e $t9"2]"
    fi
else
    $e $t9"1]"
fi