or download this
hilite_tail () {
local WORD=$1
...
SFX=$(echo $WORD | perl -pe 's/(.*)(ste(?=$)|e(?<!ste)(?=$)|es(?=$
+)|is(?<!(eis|ste))(?=$)|mos(?=$)|n(?<!ron)(?=$)|o(?=$)|ó(?=$)|.ron(?=
+$)|s(?<!(eis|.is|mos))(?=$)|steis(?=$)|é(?<!ué)(?=$)|í(?=$)|ué(?=$))/
+$2/g')
[[ $PFX != $SFX ]] && echo "${CYAN_FG}$PFX${COLOR}$SFX${RESET}" ||
+ echo "${CYAN_FG}$WORD${RESET}"
}