today_ai_weather/app/views/shared/_language_switcher.html.erb

<%# app/views/shared/_language_switcher.html.erb %>
<div class="dropdown dropdown-top">
  <label tabindex="0" class="btn btn-ghost btn-sm">
    <%= t("language.#{I18n.locale}") %>
    <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 ml-1" viewBox="0 0 20 20" fill="currentColor">
      <path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd" />
    </svg>
  </label>
  <ul tabindex="0" class="dropdown-content menu p-2 shadow bg-base-100 rounded-box w-32">
    <% [:en, :'zh-CN', :ja, :ko].each do |locale| %>
      <%= link_to url_for(locale: locale),
                  class: "px-4 py-2 hover:bg-base-200 rounded-lg #{I18n.locale == locale ? 'bg-base-200' : ''}" do %>
        <%= t("language.#{locale}") %>
      <% end %>
    <% end %>
  </ul>
</div>