feat: added Japanese translation (#10379)

* feat: add Japanese language support

* feat: add missing required keys for Japanese translation

packages/admin/dashboard/src/i18n/languages.ts

@@ -1,4 +1,4 @@
-import { de, enUS, es, fr, it, pl, ptBR, th, tr } from "date-fns/locale"
+import { de, enUS, es, fr, it, ja, pl, ptBR, th, tr } from "date-fns/locale"
 import { Language } from "./types"
 
 export const languages: Language[] = [
@@ -32,6 +32,12 @@ export const languages: Language[] = [
     ltr: true,
     date_locale: it,
   },
+  {
+    code: "ja",
+    display_name: "日本語",
+    ltr: true,
+    date_locale: ja,
+  },
   {
     code: "pl",
     display_name: "Polski",

packages/admin/dashboard/src/i18n/translations/index.ts

@@ -3,6 +3,7 @@ import en from "./en.json"
 import es from "./es.json"
 import fr from "./fr.json"
 import it from "./it.json"
+import ja from "./ja.json"
 import pl from "./pl.json"
 import ptBR from "./ptBR.json"
 import th from "./th.json"
@@ -24,6 +25,9 @@ export default {
   it: {
     translation: it,
   },
+  ja: {
+    translation: ja,
+  },
   pl: {
     translation: pl,
   },