This new feature is accessible when saving your survey as an online survey form in the Advanced tab. Choose from one of 23 dictionaries or select "None" to disable the spell check feature.
Dictionaries include are Afrikaans, Bahasa Malaysia, Brazil, Catalan, Cymric, Dansk, Deutsch, English (Australia), English (Canada), English (International), English (Legal), English (Medical), English (Scientific), English (UK), English (USA), Espanol, Francais, Frisian, Gaelic, Italiano, Nederlands, Portugues and Svenska.