Keeping Secondary Language Choice as Default for Users

Hi,

My website is currently using a trial version of Localize, with the primary language being English and secondary language being Chinese. However, I've noticed that when "Chinese" is chosen on the menu, after clicking on links from the homepage, the linked pages default back to English when they load. The pages have already been translated, and if you click on "Chinese" again from the menu, it works.

Is there any way to fix this? It is jarring and annoying for other-language users on our website.

Thanks,
Rachel