The Proton VPN extension/add-on usage can override the Firefox language setting when it assigns a user to a node in another land. That land's language can suddenly become the default language one sees, and may remain in spite of trying to reset the Firefox language default. E.g., if one is assigned a VPN node in Japan, suddenly the general language one sees is Japanese, and it remains in spite of disabling Proton VPN and even after exiting and signing back in. The only alternative one has is to request a different node and then wait for the timeout (30 sec., 2 minutes, etc.) for another and hopefully understandable language/country node. I raised this issue with Proton, and they maintain that loss of one's language proves that Proton VPN is working (see my response under ratings) 1. How does someone accept "working" VPN when one loses their ability to comprehend the displayed language? In my past experiences with other VPNs (NordVPN, etc.) they never corrupted my default browser language. 2. Accessibility issues???