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

assets/romfs/i18n/se.json

@@ -30,6 +30,9 @@
   "Sd": "Sd",
   "Image System memory": "Avbild Systemminne",
   "Image microSD card": "Avbild microSD-kort",
+  "Slow": "",
+  "Normal": "",
+  "Fast": "",
   "Yes": "Ja",
   "No": "Nej",
   "Enabled": "Aktiverad",
@@ -87,6 +90,7 @@
   "Portuguese": "Portugisiska",
   "Russian": "Ryska",
   "Swedish": "Svenska",
+  "Vietnamese": "Vietnamese",
   "Logging": "Loggning",
   "Replace hbmenu on exit": "Ersätt hbmenu vid avslut",
   "Misc": "Övrigt",
@@ -95,6 +99,7 @@
   "Install forwarders": "Installera genvägar",
   "Install location": "Installationsplats",
   "Show install warning": "Visa installationsvarning",
+  "Text scroll speed": "",
 
   "FileBrowser": "Filbläddrare",
   "%zd files": "%zd filer",
@@ -233,6 +238,7 @@
   "Update avaliable: ": "Uppdatering tillgänglig: ",
   "Download update: ": "Ladda ner uppdatering: ",
   "Updated to ": "Uppdaterad till ",
+  "Press OK to restart Sphaira": "",
   "Restart Sphaira?": "Starta om Sphaira?",
   "Failed to download update": "Misslyckades att ladda ner uppdatering",
   "Restore hbmenu?": "Återställ hbmenu?",