kecskés’ book “foreign language and mother tongue” co-authored by his wife dr. tünde papp and published by erlbaum in 2000 was the first book that described the effect of the second language on the first language based on a longitudinal research. in his book “situation-bound utterances in l1 and l2” (degruyter, 2003) he introduced the notion of sbu. kecskés’ book “intercultural pragmatics” (oxford university press, 2014) is considered a groundbreaking monograph that shapes research in the field. some of his books like “explorations in chinese as a second language” (springer 2017) and “key issues in chinese as a second language (routledge 2017) contributed significantly to research in chinese as a second language. his new monograph titled “english as a lingua franca: the pragmatic perspective” will be published by cambridge university press in october, 2019. kecskés is considered to be the founder of the sub-field “intercultural pragmatics” and promoter of the socio-cognitive approach with its dynamic model of meaning that combines the intention-based, pragmatic view of cooperation with the cognitive view of egocentrism to incorporate emerging features of communication. his contribution to pragmatics, linguistics, bilingualism and second language acquisition was recognized by his peers in a festschrift volume for his 70th birthday, “doing pragmatics interculturally” edited by rachel giora and michael haugh and published by degruyter in 2017.