Cross-lingual semantic parsing transfers parsing capability from a high-resource language (e.g., English) to low-resource languages with scarce training data. Previous work has primarily considered silver-standard data augmentation or zero-shot methods, however, exploiting few-shot gold data is comparatively unexplored. We propose a new approach to cross-lingual semantic parsing by explicitly minimizing cross-lingual divergence between probabilistic latent variables using Optimal Transport. We demonstrate how this direct guidance improves parsing from natural languages using fewer examples and less training. We evaluate our method on two datasets, MTOP and MultiATIS++SQL, establishing state-of-the-art results under a few-shot cross-lingual regime. Ablation studies further reveal that our method improves performance even without parallel input translations. In addition, we show that our model better captures cross-lingual structure in the latent space to improve semantic representation similarity.

跨语言语义解析利用最优传输从高资源语言（例如英语）向训练数据稀缺的低资源语言转移解析能力。我们提出了一种新的跨语言语义解析方法，通过显式地最小化概率潜变量之间的跨语言差异来改善自然语言解析，减少训练样本的使用。我们在 MTOP 和 MultiATIS++SQL 两个数据集上评估方法，在少样本跨语言情景下取得了最先进的结果。消融研究进一步揭示了我们的方法即使没有平行输入翻译也能提高性能。此外，我们展示了我们的模型更好地在潜空间中捕获跨语言结构，从而提高了语义表示的相似性。

跨语义解析的最佳传输后验对准