Learning a foreign language involves far more than simply learning its linguistic system. To be able to communicate successfully in a foreign language, learners need, among other things, a degree of acculturation. This means that they need to familiarize themselves with certain sociolinguistic norms surrounding language use. Failure to consider such sociolinguistic factors might result in a breakdown in communication despite the use of accurate language forms. At the same time, gratitude and suggestion speech acts are among the frequently needed functions of language. The aim of the present...