How do you run one national survey in several languages?
Design the survey once, then add the languages you need on the Translate tab. Enumerators see the questions in their own language while every response lands in the same dataset, so a multilingual survey needs no separate forms and no merging afterwards.
Running a separate form per language is the usual shortcut, and it quietly costs you the national dataset: the forms drift apart as questions are revised, and the results have to be reconciled by hand. Keeping one design with translations attached means a change to a question reaches every language, and analysis happens across the whole country at once, which is what national reporting and comparison between regions actually require.
How to do it
Confirm the base language of the design with "Change Base Language". It defaults to English, which is not always what the survey was written in.
Use "Add/Edit Languages" to add each target language, including a custom language with its own two-letter code if it is not listed.
Translate online with "Edit Translations Online" for small surveys: the base language sits on the left with one column per language.
For larger surveys, export to Excel, have translators work in the file, and upload it back.
Preview the survey in each language before deploying, checking that skip logic and choice lists read correctly.
Deploy the single survey to all teams. Enumerators pick their language and the responses stay in one dataset.