Multilingual switch button support

[stevenjoezhang]

Issue resolved: #1070

+# Show multilingual switcher in footer.
+language_switcher: false

[ZhaoEli]

大神，可以开发一个文章底部点赞功能么！

[stevenjoezhang]

已经有了，直接用就行。

[stevenjoezhang]

Currently hexo-generator-index does not generate separate homepages for posts in different languages. For example,

source/
    _posts/
        zh-cn/
            post-zh.md
        en/
            post-en.md

Both posts will appear in the index page (/index.html , but not one in /index.html and the other in /zh-cn/index.html) - Unless you write your own script, modify configuration (e.g. url and root in _config.yml) and source files, then execute hexo g multiple times; or use 3rd-party plugins like hexo-generator-i18n.

Therefore, this pull requestis only partially done. Full multi-language support needs to wait for the hexo generator implementation.

[suyin-long]

这个效果怎么看不错来呢？设置后那个切换语言的按钮在哪呢？

[rexwangcc]

@suyin-long 需要在next/_config.yml中设置 language_switcher: true, 之后会在footer（页面的最下端）显示一个小图标。不满意位置的话可以自行定义sidebar等模板来放置这个选择框。

[zhengfc]

图标是显示在底部了，一点击的话就是404了；模板要能根据选择语言读语言配置文件的数据就好了；这样至少整体页面结构首先就能切换了

[ext2ed]

@suyin-long 需要在next/_config.yml中设置 language_switcher: true, 之后会在footer（页面的最下端）显示一个小图标。不满意位置的话可以自行定义sidebar等模板来放置这个选择框。

你好，我设置了 language_switcher: true 以后，好像没有图标在 footer 显示，是需要其他额外的设置吗

[Gabirel]

Currently hexo-generator-index does not generate separate homepages for posts in different languages. For example,

source/
    _posts/
        zh-cn/
            post-zh.md
        en/
            post-en.md

Both posts will appear in the index page (/index.html , but not one in /index.html and the other in /zh-cn/index.html) - Unless you write your own script, modify configuration (e.g. url and root in _config.yml) and source files, then execute hexo g multiple times; or use 3rd-party plugins like hexo-generator-i18n.

Therefore, this pull requestis only partially done. Full multi-language support needs to wait for the hexo generator implementation.

I've made it generate automatically and works very well, except for some several glitches.

Steps to set up

Note for setting up multilingual website：

1. Combine hexojs/hexo-generator-index and xcatliu/hexo-generator-index-i18n (install them)
2. Make sure you add ja into your site config (aka, hexo/_config.yml)
3. Create your posts via hexo new --lang ja "This is a new title"
4. hexo clean && hexo g && hexo s
5. Then you should see your post written by Japanese only if you switch your language to Japanese.

PS: This method has a bug that needs to be done in next-theme itself. Please see issue: https://github.com/next-theme/hexo-theme-next/issues/54

Current issues

1. See issue: https://github.com/next-theme/hexo-theme-next/issues/54

2. Multiple language pages cannot be generated with the current version of Hexo. (Tell me if I am wrong.)

   For example, /categories/ is showing your default page, such English. You can't have /ja/categories/ at this time, as well as page tag, archives, about.
   This works perfectly for now. Check my website and email me if you have any questions.

3. Search in next-theme still goes through the whole database based on your posts. Normally, if you only speak Chinese, you don't want to get search results from some posts written by Japanese since you don't understand that language at all. Right? But, it is the case for now. (search plugins need to add multilingual support as well.)

4. next/previous page in the post view contains multiple language posts. When you switch to Japanese, you should end up those Japanese pages only. (I will create a new issue for this.)

5. If you do not have the same title for your multiple posts written by different languages, it will lead you to 404 not found.

Demo links

• Default view (have bugs here: it shows all pages while it shouldn't. English posts have to be the ones only in default view. Bug fixed) ⚙️
  https://godeep.pro/
  PS: My default language is English. So, my menu is all English.

• Chinese view (only contains Chinese pages) 👍
  https://godeep.pro/zh-CN/index.html

• English view (only contains English pages) 👍
  https://godeep.pro/en/index.html

• Japanese view (only contains Japanese pages) 👍
  https://godeep.pro/ja/index.html

[doutv]

@suyin-long 需要在next/_config.yml中设置 language_switcher: true, 之后会在footer（页面的最下端）显示一个小图标。不满意位置的话可以自行定义sidebar等模板来放置这个选择框。

你好，我设置了 language_switcher: true 以后，好像没有图标在 footer 显示，是需要其他额外的设置吗

需要在根目录下的 _config.yml 修改 language，只有 language_switcher: true 且 language 数量大于 1，才会显示

language:
- en
- zh-CN

[Happylinzy]

修改语言后，侧边栏的tag，categories等按钮需要在source目录下设置对应语言文件夹下的index才能替换。但是点击跳转还是回到默认的英文路径下