Idioms are common in everyday language, but often pose a challenge to translators because their meanings do not follow from the meanings of their parts. Despite significant advances, machine translation systems still struggle to translate idiomatic expressions. We provide a simple characterization of idiomatic translation and related issues. This allows us to conduct a synthetic experiment revealing a tipping point at which transformer-based machine translation models correctly default to idiomatic translations. To expand multilingual resources, we compile a dataset of ~4k natural sentences containing idiomatic expressions in French, Finnish, and Japanese. To improve translation of natural idioms, we introduce two straightforward yet effective techniques: the strategic upweighting of training loss on potentially idiomatic sentences, and using retrieval-augmented models. This not only improves the accuracy of a strong pretrained MT model on idiomatic sentences by up to 13\% in absolute accuracy, but also holds potential benefits for non-idiomatic sentences.

Crossing the Threshold: Idiomatic Machine Translation through Retrieval Augmentation and Loss Weighting

One of the challenges in language teaching is how best to organize rules regarding syntax, semantics, or phonology in a meaningful manner.
This not only requires content creators to have pedagogical skills, but also have that language's deep understanding.
While comprehensive materials to develop such curricula are available in English and some broadly spoken languages, for many other languages, teachers need to manually create them in response to their students' needs.
This is challenging because i) it requires that such experts be accessible and have the necessary resources, and ii) describing all the intricacies of a language is time-consuming and prone to omission.
In this work, we aim to facilitate this process by automatically discovering and visualizing grammar descriptions.
We extract descriptions from a natural text corpus that answer questions about morphosyntax (learning of word order, agreement, case marking, or word formation) and semantics (learning of vocabulary).
We apply this method for teaching two Indian languages, Kannada and Marathi, which, unlike English, do not have well-developed resources for second language learning.
To assess the perceived utility of the extracted material, we enlist the help of language educators from schools in North America to perform a manual evaluation, who find the materials have potential to be used for their lesson preparation and learner evaluation.

Teacher Perception of Automatically Extracted Grammar Concepts for L2 Language Learning

Learning fine-grained distinctions between vocabulary items is a key challenge in learning a new language. For example, the noun "wall'' has different lexical manifestations in Spanish --" pared’’ refers to an indoor wall while "muro’’ refers to an outside wall. However, this variety of lexical distinction may not be obvious to non-native learners unless the distinction is explained in such a way. In this work, we present a method for automatically identifying fine-grained lexical distinctions, and extracting concise descriptions explaining these distinctions in a human- and machine-readable format. We confirm the quality of these extracted descriptions in a language learning setup for two languages, Spanish and Greek, where we use them to teach non-native speakers when to translate a given ambiguous word into its different possible translations.

When is Wall a Pared and when a Muro?: Extracting Rules Governing Lexical Selection

Active learning (AL) uses a data selection algorithm to select useful training samples to minimize annotation cost. This is now an essential tool for building low-resource syntactic analyzers such as part-of-speech (POS) taggers. Existing AL heuristics are generally designed on the principle of selecting uncertain yet representative training instances, where annotating these instances may reduce a large number of errors. However, in an empirical study across six typologically diverse languages (German, Swedish, Galician, North Sami, Persian, and Ukrainian), we found the surprising result that even in an oracle scenario where we know the true uncertainty of predictions, these current heuristics are far from optimal. Based on this analysis, we pose the problem of AL as selecting instances which maximally reduce the confusion between particular pairs of output tags. Extensive experimentation on the aforementioned languages shows that our proposed AL strategy outperforms other AL strategies by a significant margin. We also present auxiliary results demonstrating the importance of proper calibration of models, which we ensure through cross-view training, and analysis demonstrating how our proposed strategy selects examples that more closely follow the oracle data distribution.

Reducing Confusion in Active Learning for Part-Of-Speech Tagging

Machine Translation

technical paper

**Welcome to EMNLP 2023!**

On behalf of the EMNLP 2023 Organizing Committee, I extend a warm and heartfelt welcome to all of you to the 2023 Conference on Empirical Methods in Natural Language Processing (EMNLP). It is with immense pleasure and excitement that we gather here in Singapore, a vibrant hub of innovation and technological advancement.

The conference program is packed with insightful presentations, thought-provoking workshops, and engaging networking opportunities. In addition to the technical sessions, we have also planned several social events that will provide you with the opportunity to connect with your colleagues.

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Yuji Matsumoto (RIKEN AIP) 
EMNLP 2023 General Chair

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Virtual Poster Session II: Semantics: Lexical, Sentence level, Textual Inference and Other areas

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EMNLP 2021

EMNLP 2021 is planned to be a hybrid event in Punta Cana, Dominican Republic, with both on-site and fully virtual participation possible.

**Session Chair: **Diyi Yang 
**In Person Volunteer:** Daryna Dementieva 
** Remote Volunteer:** Ayush Kaushal

6F: Semantics 2

**Session Chair: ** Mike Lewis

8E-Oral: Syntax: Tagging, Chunking, and Parsing

2021 Annual Conference of the North American Chapter of the Association for Computational Linguistics.

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Aditi Chaudhary

5

6

SHORT BIO

Presentations

Crossing the Threshold: Idiomatic Machine Translation through Retrieval Augmentation and Loss Weighting

Teacher Perception of Automatically Extracted Grammar Concepts for L2 Language Learning

When is Wall a Pared and when a Muro?: Extracting Rules Governing Lexical Selection

When is Wall a Pared and when a Muro?: Extracting Rules Governing Lexical Selection

Reducing Confusion in Active Learning for Part-Of-Speech Tagging

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