CEDEL2: Design, compilation and web interface of an online corpus for L2 Spanish acquisition research

This article presents and reviews a new methodological resource for research in second language acquisition (SLA), CEDEL2 ( Corpus Escrito del Español L2 ‘L2 Spanish Written Corpus’), its free online search-engine interface cedel2.learnercorpora.com ). is multi-first-language corpus (Spanish, English, German, Dutch, Portuguese, Italian, French, Greek, Russian, Japanese, Chinese, Arabic) of learners at all proficiency levels. It additionally contains several native control subcorpora (English, Arabic). Its latest release (version 2) holds material from around 4,400 speakers, which amounts to over 1,100,000 words. follows strict corpus-design criteria (Sinclair, 2005) recommendations (Tracy-Ventura Paquot, 2021), are equally designed be fully contrastable, as recommended by Contrastive Interlanguage Analysis (Granger, 2015). Thanks design web interface, allows complex searches can further narrowed down according SLA-motivated variables, e.g. first (L1), level, self-reported age onset the L2, length exposure residence Spanish-speaking country, knowledge other foreign languages, type task, etc. These features allow researchers address SLA questions hypotheses.