In this final article in this guest-edited issue on synergies in second language acquisition and teaching (SLA/T), we attempt to bring together the main content of this issue in an overall, combined synergy statement, concluding this project as a whole. Let us remind readers of the project: A shared effort by 17 scholars taking 11 different…

This book contributes to emerging research on third language acquisition (TLA) and pinpoints the main factors characterising TLA as a different process and area of study from second language acquisition. Moving beyond the dichotomous conception of monolingualism and bilingualism, it proposes a holistic and interdisciplinary approach to studying…

Language is crucial for adapting to society, and learning different languages enhances human efficiency. Learning a second language involves acquiring any language in addition to one's native language. Second Language Acquisition (SLA) has two meanings, generally, it describes the process of learning a second language, and more specifically, it…

Purpose: This meta-analysis study aimed to determine the optimal level of talker variability in training to maximize second-language speech learning. Method: We conducted a systematic search for studies comparing different levels of talker variability in nonnative speech training, published through July 2024. Two independent reviewers screened…

Second language acquisition (SLA) researchers have long searched for patterning in the development of linguistic elements (e.g., grammar and morphology). However, little attention has been given to the examination of systematicity in vocabulary acquisition, limiting our understanding about how overall vocabulary is learnt. The current study…

Spanish is the second most common language among US children aged 5-17, with 26.8% speaking it at home. To foster cultural understanding and promote positive relationships, it's crucial to introduce young children to different languages and cultures. Preschool language education can cultivate respect and empathy, building more inclusive…

This paper presents the outcomes of an action research study that implemented a linguistic landscape (LL) unit as an English language learning activity at the secondary school level in Rayong, Thailand. The theoretical framework employed in this study draws upon Lefebvre's (1991) conceptualization of space, adapted for pedagogical purposes as…

Learning a foreign language enables people to get to know different cultures. People who know different cultures get richer. So, their prejudices against people are destroyed. Thus, a foreign language student may both improve himself and become a better person. In this context, the aim of the present study is to learn the thoughts of Turkish…

While it is widely accepted that language teachers require knowledge of second language acquisition (SLA) (Richards, 2010), what about content teachers, who are increasingly required to help develop their learners' academic language proficiency? How much do they need to know about SLA theories and how can they acquire such knowledge and expertise?…

Counterfactuals are a type of conditional sentences used to convey situations that do not correspond to reality. Tense morphology is a core ingredient to encode counterfactuals in English and most Indo-European languages. Mandarin Chinese (hereafter Chinese) lacks tense morphology and does not require counterfactuals to be formally distinguished…

In this position paper we present research and data demonstrating how pedagogical frameworks traditionally used in TESOL contexts can be harnessed by world language (WL) educators to scaffold language learning and advocate for emergent multilingual language learners (EMLLs). Focusing on three pedagogical frameworks--Sheltered Instruction…

Although use of machine translation (MT) technologies by learners may seem like a relatively new issue in foreign language (FL) education, researchers have been investigating connections between MT tools and FL teaching and learning for more than three decades, years before learners had access to free online services such as Google Translate. This…

This paper provides fresh insights on how PIs (Polarity Items) in non-veridical contexts (questions and conditionals) are represented in the grammar of multilingual learners of Catalan at different stages of development. It explores how this non-native grammatical system interacts with other previously acquired systems of negation and the implicit…

Implementing high-leverage teaching practices (HLTPs) for language learning can help ensure teachers create and deliver a high-quality curriculum, especially when working with Novice learners who require more scaffolded instruction. This study aimed to fill a gap by identifying print resources and approaches available to support world language…

This study investigated whether second language (L2) classroom instruction that incorporates a principled approach into the use of the first language (L1) by students and instructors has an effect on beginning learners' development of L2 speaking and writing proficiency, compared to L2-only instruction, over the course of one semester.…