I found this Windows program to embed the data of an Android application in a new apk along with the application.
But it seems that it uses old smali files, baksmali, apktool.
I tried new files but it didn't make a difference.
To change the language to English, simply change the first menu option and select the language as English.
If someone can try the program and see if it can make it work, let me know.
I tried it with a couple of applications like Kodi, but after installing the modified apk, it seems like a normal installation and does not restore any user data or settings. Some other applications cannot be repackaged probably due to the old jar, apktool files that it still uses.
To use it
1] Make a backup of your application with Titanium Backup
2] Load the apk with the first program button
3] Load the data backup of the tar.gz application made with Titanium Backup with the second program button
4] The third button creates the modified application that includes the application data.
It would be great to use it to install an application with your data on unrooted Android devices.