I can't give you the exact locations as I don't know them. There's hundreds of strings. You really need to translate the entire plugin to get complete accuracy. For example the below strings somewhat match the display, but I do not know where each is used exactly.
Code:
"[ITEMS_ALIASES] for [USERNAME]" => "[ITEMS_ALIASES] for [USERNAME]",
"[PREFIX_TEXT][ITEM_NAME] for [USERNAME]" => "[PREFIX_TEXT][ITEM_NAME] for [USERNAME]",
", then " => ", then ",
Code:
"%3\$s for each %4\$s" => "%3\$s for each %4\$s",
"%3\$s for each %4\$s, in %5\$s installments" => "%3\$s for each %4\$s, in %5\$s installments",
Code:
"%s for the first %s, then %s each %s" => "%s for the first %s, then %s each %s",
"%s for the first %s, then %s for each %s, in %s installments" => "%s for the first %s, then %s for each %s, in %s installments",
Code:
"%s, then %s" => "%s, then %s",
You'll need to review the below language file.
components/com_comprofiler/plugin/language/cbpaidsubscriptionsenglish/english.php