你可以了解你需要了解的一切，你需要了解 Android应用程序包在这里 。因为这是一个新的交付APK的方式，我对它的工作原理非常感兴趣。
当看看链接网站您将理解应用程序包只会在 google play 上下载适当的语言资源文件。
现在，在安装后更改系统语言时会发生什么？即使在原始 app bundle 中，应用程序也不会翻译，我的语言包装？
You can find out everything you need to know about Android App Bundles here. As this is a new way to deliver apk's I am very interested in how it works.
When taking a look at the explanatory video provided on the linked site you will understand that the App Bundle will only send the appropriate language resource files on download from Google Play.
Now, what happens when I change the system language after installation? Will the application not translate even if in the original App Bundle there was my language packaged?
According to a Google I/O '18 talk Google Play will download all "typically used languages" and retrieve others on demand.
In the rare case, where a user switches to a new language that we weren't aware of before, Play will dynamically deliver relevant splits to their device. (https://youtu.be/0raqVydJmNE?t=13m9s)
Suppose your app supports two languages English And Spanish.
Case 1 : You are uploading APK both languages will be shipped it is upto user to select what they want to use.
Case 2: You know that certain user will always use Spanish so rather than whole package apk you can send Bundle with spanish support only.
If you have shipped app with Spanish but user wants English google will dynamically ship those split apks for English.
But if user opts for French it won't be supported since your app have English and Spanish support only user can use third party if they want to translate.
Yes , if you're app has support for that language google will ship it even if it is not in bundle.
No , if you don't have support for selected language.