In case your site supports more than 1 languages, you will have the choice to choose your preferred language after the integration process.
So, log in your dashboard, select the questionnaire you want to set up the language (e.g Browse) and go to distribution page.
From your questionnaire's web integration settings, you can select the display language of questionnaire.
The first option is to turn on the auto language detection. The questionnaire's language would be adjustable to user's preferred (browser) language.
Otherwise, turn off the auto language detection and select among the list of available languages.
The available language options are: Catalan, Greek, English, English (US), Spanish, Romanian
Note: If you turn off the auto language detection, you can choose only one language!