Portuguese translation of the 2021 survey

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Submit the translations in this document:
https://docs.google.com/spreadsheets/d/1Q-PnPY6DuuzVuCrbgmi72BIkkwJ4LTHCyPcTZLG6i1I/edit?usp=sharing

• Welcome and instructions
• Thank you and confirmation
• Closed survey message
• Screener -- redirect to other languages??
• Questionnaire/questions
• Dry Run / Preview
• Finalize
• Survey rules and settings
• Social Media copy