These settings will be applied to this specific poll only. If you want to adjust the settings for all polls then please use the Account -> Language Tab.
Language settings are a translation file for every possible bit of text that is used within the Zigpoll form. This means you can translate buttons that say "Submit" to say something else that better fits your brand or locale.
To update the language simply fill in a replacement word next to the text that you want to replace. Then press save once you are finished.