Targeted Syntactic Evaluation of Language Models on Georgian Case Alignment

• URL: http://arxiv.org/abs/2602.10661v2
• Date: Fri, 13 Feb 2026 11:46:57 GMT
• Title: Targeted Syntactic Evaluation of Language Models on Georgian Case Alignment
• Authors: Daniel Gallagher, Gerhard Heyer,
• Abstract summary: We focus on subject and object marking determined through various permutations of nominative, ergative, and dative noun forms.<n>We create a dataset of 370 syntactic tests made up of seven tasks containing 50-70 samples each.<n>Models performed worst in assigning the ergative case correctly and strongest in assigning the nominative case correctly.
• Score: 0.7161783472741746
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This paper evaluates the performance of transformer-based language models on split-ergative case alignment in Georgian, a particularly rare system for assigning grammatical cases to mark argument roles. We focus on subject and object marking determined through various permutations of nominative, ergative, and dative noun forms. A treebank-based approach for the generation of minimal pairs using the Grew query language is implemented. We create a dataset of 370 syntactic tests made up of seven tasks containing 50-70 samples each, where three noun forms are tested in any given sample. Five encoder- and two decoder-only models are evaluated with word- and/or sentence-level accuracy metrics. Regardless of the specific syntactic makeup, models performed worst in assigning the ergative case correctly and strongest in assigning the nominative case correctly. Performance correlated with the overall frequency distribution of the three forms (NOM > DAT > ERG). Though data scarcity is a known issue for low-resource languages, we show that the highly specific role of the ergative along with a lack of available training data likely contributes to poor performance on this case. The dataset is made publicly available and the methodology provides an interesting avenue for future syntactic evaluations of languages where benchmarks are limited.

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