Manual translation needed. SIMS does not do automatic translations, it’s just too risky for a variety of reasons. And a frequently inaccurate technology, ie Google translate has been trying this for years https://translate.google.com/
A few SIMS Ballot recommendations:
One ballot, combine the two languages text within in each question.
Two separate ballot tests. Which language do you prefer?
One ballot, initial language question, then use branching. Which language do you prefer? ( ) English ( ) Spanish/Española
All Western Languages such as English, Spanish, German, French, Portuguese Italian, etc. SIMS 100% supports perfectly fine.