Zio
You are using self-hosted PenX, right?
like notion, input "/", find the image block: 
Yes, R2 is required, [Is it possible to use some external link] will be supported in the feature. Also, you can try PenX cloud
@wnpllrzodiac external link is supported now 
Now in the cloud version, you can set the default lang for blog 
About the open source version, we will support it soon
If you are using self-hosted PenX, the recommended way is using "https://penx.io/self-hosted" to deploy, and click redeploy button to deploy latest version