How can I set HTMLLanguage per session or form?

[magosk]

Sorry for the delay, but here is a simple test application created using the new IntraWeb project wizard. If I check the project source (in Edge) after initial load, the language is set for Swedish (sv), but if I click the button, the updated page will revert to English (en), at least in the IntraWeb version I am using. Interesting to know if this is different in newer versions (or if I have missed something).