Hi Caseym:
Our tech team has looked into this further, and it appears to be a function of vBulletin (the system our Forums runs off) rather than a bug…
The language dropdown at the bottom of the page in the forums allows to change your language and it does this by adding the ‘langid=’ parameter on the end of the URL. When following a Google link which also has the ‘langid=’ on the end it is effectively doing the same as selecting a language from the dropdown.
I wish there was something more we could do. Please let me know if you have any other questions!
Best,
Jill