If you need to work on foreign resources, you use a proxy for this region, but sites can also receive data about the language you use for typing. Therefore, if you want to remain inconspicuous, then you should specify the languages that are relevant for this region. To do this, click the Settings button in the extension, then click the button:
This will open the Geo Settings menu. There you can manually specify the languages you need in the appropriate field.
Then scroll down the menu and press the Set New Geo-Settings button.