fix: confusing wording for billing cycle

docs: update screenshots on readme

includes/i18n/fr.php

@@ -42,6 +42,10 @@ $i18n = [
     "Weekly" => "Hebdomadaire",
     "Monthly" => "Mensuel",
     "Yearly" => "Annuel",
+    "daily" => "Jour(s)",
+    "weekly" => "Semaine(s)",
+    "monthly" => "Mois",
+    "yearly" => "Année(s)",
     "days" => "jours",
     "weeks" => "semaines",
     "months" => "mois",
@@ -58,7 +62,7 @@ $i18n = [
     "search_logo" => "Rechercher un logo sur le web",
     "web_search" => "Recherche web",
     "currency" => "Devise",
-    "billing_cycle" => "Cycle de facturation",
+    "payment_every" => "Paiement tous les",
     "frequency" => "Fréquence",
     "cycle" => "Cycle",
     "next_payment" => "Prochain paiement",