add new strings and update ko.json, ja.json (#88)

assets/romfs/i18n/fr.json

@@ -30,6 +30,9 @@
   "Sd": "Sd",
   "Image System memory": "Image de la mémoire System",
   "Image microSD card": "Image de la Carte microSD",
+  "Slow": "",
+  "Normal": "",
+  "Fast": "",
   "Yes": "Oui",
   "No": "Non",
   "Enabled": "Activé(e)",
@@ -87,6 +90,7 @@
   "Portuguese": "Português",
   "Russian": "Русский",
   "Swedish": "Svenska",
+  "Vietnamese": "Vietnamese",
   "Logging": "Journalisation",
   "Replace hbmenu on exit": "Remplacer hbmenu quand quitté",
   "Misc": "Divers",
@@ -95,6 +99,7 @@
   "Install forwarders": "Installer les Forwarders",
   "Install location": "Emplacement d'installation",
   "Show install warning": "Afficher l'avertissement d'installation",
+  "Text scroll speed": "",
 
   "FileBrowser": "Explorateur de Fichiers",
   "%zd files": "%zd fichiers",
@@ -233,6 +238,7 @@
   "Update avaliable: ": "Mise à jour disponible: ",
   "Download update: ": "Télécharger la mise à jour: ",
   "Updated to ": "Mis à jour vers ",
+  "Press OK to restart Sphaira": "",
   "Restart Sphaira?": "Redémarrer Sphaira?",
   "Failed to download update": "Echec du téléchargement de la mise à jour",
   "Restore hbmenu?": "Restaurer hbmenu?",