We are using the JQuery-UI product (version 1.12.1) in our application and had a few queries around it.
Background :-
We were using JQuery-UI (1.10.4) in our product and we started an upgrade to 1.12.1 version. During the upgrade, we found that the i18n folder which was available in the 1.10.4 has been removed in 1.12.1 version.

Few queries around this –

1. Can you let us know why the folder was removed?
2. What is the alternative for these files in 1.12.1 formal download?
3. We have seen the JQuery blog which also lists the JQuery-UI versions and their respective files. On this Github link we have the version 1.12.1 available. This link also contains the i18n folder.
   Can this folder be used for the purposes of Language Support in our application ?
   https://blog.jqueryui.com/2016/09/jquery-ui-1-12-1/

Git (contains source files, with @Version replaced with 1.12.1, base theme only)
http://github.com/jquery/jquery-ui/tree/1.12.1