i18n Setup

import { defineConfig } from "sonamu";

export default defineConfig({
  // ... other settings

  i18n: {
    defaultLocale: "ko", // Default language
    supportedLocales: ["ko", "en"], // List of supported languages
  },
});

import { createFormat, josa } from "sonamu/dict";

const format = createFormat("ko");

export default {
  // Common UI
  "common.save": "저장",
  "common.cancel": "취소",
  "common.delete": "삭제",
  "common.results": (count: number) => `${count}개 결과`,

  // Error messages
  "error.notFound": "찾을 수 없습니다",
  "error.unauthorized": "인증이 필요합니다",

  // Validation messages (function type)
  "validation.required": (field: string) => `${josa(field, "은는")} 필수입니다`,
  "validation.email": "올바른 이메일 형식이 아닙니다",

  // Simple keys are also allowed (but namespace pattern is recommended)
  notFound: (name: string, id: number) => `존재하지 않는 ${name} ID ${id}`,
  test: (date: Date) => format.date(date),
} as const;

import { plural } from "sonamu/dict";
import { defineLocale } from "./sd.generated";

export default defineLocale({
  // Common UI
  "common.save": "Save",
  "common.cancel": "Cancel",
  "common.delete": "Delete",
  "common.results": (count: number) =>
    plural(count, { one: `${count} result`, other: `${count} results` }),

  // Error messages
  "error.notFound": "Not found",
  "error.unauthorized": "Authentication required",

  // Validation messages
  "validation.required": (field: string) => `${field} is required`,
  "validation.email": "Invalid email format",

  // Simple keys (namespace pattern recommended)
  notFound: (name: string, id: number) => `${name} ID ${id} not found`,
});

import { setLocale, getCurrentLocale, SUPPORTED_LOCALES } from "@/i18n/sd.generated";

// Change locale
setLocale("en");

// Check current locale
const current = getCurrentLocale(); // "en"

// sonamu.shared.ts (auto-generated — no manual setup needed)
axios.interceptors.request.use((config) => {
  config.headers["Accept-Language"] = getCurrentLocale();
  return config;
});

// api/src/middlewares/locale.ts
import { Sonamu } from "sonamu";

export async function localeMiddleware(request: FastifyRequest) {
  // Extract locale from Accept-Language header or query parameter
  const locale =
    request.headers["accept-language"]?.split(",")[0]?.split("-")[0] ||
    request.query.locale ||
    "ko";

  // Set locale in Context
  const ctx = Sonamu.getContext();
  ctx.locale = locale;
}

cd api
pnpm sync