No, you can’t, because the error messages your visitors get when they submit wrong or missing information in your campaigns are determined by their browser language.
Regardless of your website or campaign language, your visitors will always see error messages in the language their browser is set to.
Currently, our campaigns support error messages in these languages: English, Danish, Norwegian, Swedish, Dutch, German, Italian, Spanish, Japanese, Chinese, French, Haitian, Javanese, Khmer, Korean, Polish, Portuguese, Russian, and Kazakh.