如何使用Go语言进行代码国际化

package main

import (
    "fmt"
    "html/template"
    "net/http"
    "os"
)

func main() {
    http.HandleFunc("/", handleRequest)
    http.ListenAndServe(":8080", nil)
}

func handleRequest(w http.ResponseWriter, r *http.Request) {
    // 根据请求的区域设置，选择不同语言的模板文件
    locale := r.Header.Get("Accept-Language")
    fileName := getTemplateFileName(locale)

    // 根据模板文件渲染页面
    templateData, err := os.ReadFile(fileName)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    tmpl, err := template.New("template").Parse(string(templateData))
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    data := struct {
        Title string
    }{
        Title: localization("Welcome", locale),
    }

    err = tmpl.Execute(w, data)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }
}

func getTemplateFileName(locale string) string {
    switch locale {
    case "en":
        return "template_en.html"
    case "zh":
        return "template_zh.html"
    default:
        return "template_en.html"
    }
}

func localization(text, locale string) string {
    switch locale {
    case "zh":
        return "欢迎"
    default:
        return "Welcome"
    }
}