I just visited a few bike product pages, and the language switcher is working correctly. Could you share a URL where the issue can be seen and that we can use as a reference?
No, you are looking at the older production site, The new site is not yet publicly available unless you change the DNS in your /etc/hosts on your mac or linux box.
Sorry about the delay. For unexplainable reasons, the flags do work correctly now on the single product pages. Please let me know when the plugin has been fixed so we can normally translate without having to disable/re-enable your plugin. Thanks so kindly for your help.