Is it possible to change languages of UI in ThingWorx at runtime without using Runtime preview.

Hi @Chiranjit_994 

Thank you for your question!

I’d like to recommend to bring more details and context to your initial inquiry. Please refer to this guideline to make your questions more likely to receive a quick and useful answer.
It also helps to have screenshot(s) to better understand what you are trying to do in your process. 

This will increase your chances to receive meaningful help from other Community members. 
 

Best regards,

Hello,
You can give a dropdown on page and on change you can set preference of language, refer below discussion:

Switch language preference on demand - PTC Community

Thanks!

In the user's detailed page, go to "General Information" tab, user can change the "Language" for the user's preference locale .