EFLLex aims to a lexicon of receptive vocabulary for English as a second/foreign language (EFL) that reports the normalized frequencies of words (lemmas) across 5 of the six levels of the CEFR (Common European Framework of Reference for Languages), excluding C2. Apart from information on single word usage, this list will also contains multi-word expressions and information on their usage at different levels, something that is rarely present in the resources of this kind. In the beta version, only single word are included.

The frequencies have been estimated on a corpus of 13 EFL textbooks and 8 on-line resources.

More details on the corpus, the computation and normalization of the word frequencies, and the ressource itself can be found in:

If you are using EFLLex, please, cite the above article.

Features

menu_book	Receptive lexicon includes word frequencies observed in textbook reading activities and simplified readers
bar_chart	CEFR levels A1 · A2 · B1 · B2 · C1
toc	Lexical entries lemma (word) part of speech (tag)
calculate	Computed metrics level_freq · normalized frequency (per 1 million words) for each level of the CEFR total_freq · total normalized frequency in the source corpus nb_doc · document frequency

Example of some entries from EFLLex

Lemma	POS-tag	A1	A2	B1	B2	C1	Total
cat	NN	77.40	351.71	39.19	28.57	22.53	79.38
empty	JJ	0	28.83	28.65	102.29	37.84	61.88
explore	VB	0	153.38	60.50	109.99	205.43	130.37
tiresome	JJ	0	0	0	4.97	15.5	6
video	NN	65.19	0	67.87	81.76	111.06	90.93
write	VB	758.66	1421.51	1064.47	682.26	1104.72	1053.96
shopping center	NN	0	45.12	9.80	0	15.50	11.45

Format

The format is a .CSV (tab separated values) file with 8 columns (see above), encoded in UTF-8. You can also open it in an excel sheet.

Usage

search Search

The resource can be used to compare the frequency distribution of multiple words along the CEFR scale. An online query interface is available and can be accessed via the Search tab.

bar_chart Analyse

The resource can also be used to analyze the complexity of words in a text, in particular to identify which of the words in a text will be difficult at a given level. An online complexity analyzer is available and can be accessed via the Analyze tab.

get_app Download

You can use EFLLex in NLP tasks but also for pedagogical and language assessment purposes.

Authors

Contributors