There is a "Chose your region" link at the bottom of this page:
The trial version is the same as the full version. Just put in your serial number to convert to the full version.
If you are asking how to be sure that you are purchasing a specific language version of Premiere Elements 13/13.1, best to consult with Adobe Chat Sales
You should be able to set the language in the English version to a specific language during the program License This Product.
This is not Adobe. Rather user to user. Please investigate the Adobe contact link above. If any problems, please let us know, and we will determine if we can find additional information for you.
From what I have understood of your question, you know all about the tryout.
The key to what you seek is first to have a purchased serial number that you can enter into these downloads, and you want to make sure that you have control over the language in that purchased version. For many downloads, you may be able to set the download language immediately before the download.
Adobe should be able to define the details for you.