My concern is end user might not understand what is cpu architecture. And this is the title of the dialog, normally title will be more general description, right? Details should be told by the message.
You remind me that this message is not only for Library, it also serves embedded mode. I will write different strings for them. 
Even more, the dialog needs to be different also, should we keep the `go to store` option? although we can use the app's package to search in playstore, but if that author doesn't upload the right app for the device, end user will be very confused.
For the String, how about
Title:
`Mismatch on process architecture between Crosswalk and your device`
Message for shared mode:
`Please install Crosswalk Runtime Library for <os.arch>`
Message for embedded mode:
`Please install <app name> packaged with Crosswalk for <os.arch>`

@yongsheng @darktears .