The present study assesses linguistic and geographic diversity in selected outlets of SLA and multilingualism research. Specifically, we examine over 2,000 articles published in specialized top-tier journals, recording the languages under study and their acquisition order, author affiliations, the country in which the research was conducted, and citations. In the sample, there were 183 unique languages and 174 unique pairings, corresponding to 3 per cent of the world’s 7,000 languages and less than 0.001 per cent of 24.5 million possible language combinations. English was overwhelmingly the most common language, followed by Spanish and Mandarin Chinese. North America and Western Europe were both the main producers of knowledge and the main sites for research on multilingualism in the sample. Crucially, the regions with the highest levels of linguistic diversity and societal multilingualism (typically the Global South) were only marginally represented. The findings also show that studies on English and northern Anglophone settings were likely to elicit more citations than studies on other languages and settings, and that less studied languages were included more frequently in article titles.

中文翻译：

---

第二语言习得和多语言研究中的语言和地理多样性：对选定期刊的分析

本研究评估了 SLA 和多语言研究的选定渠道中的语言和地理多样性。具体来说，我们检查了发表在专业顶级期刊上的 2,000 多篇文章，记录了所研究的语言及其获取顺序、作者隶属关系、进行研究的国家和引用情况。在样本中，有 183 种独特的语言和 174 种独特的配对，相当于世界上 7,000 种语言的 3% 和 2450 万种可能的语言组合中的不到 0.001%。英语是绝大多数最常用的语言，其次是西班牙语和普通话。北美和西欧既是知识的主要生产者，也是样本中多语言研究的主要场所。至关重要的是，语言多样性和社会多语言水平最高的地区（通常是全球南方）仅占少数。研究结果还表明，与对其他语言和环境的研究相比，对英语和北部英语环境的研究可能会引出更多的引用，而且研究较少的语言更频繁地出现在文章标题中。