The great majority of languages in the world are considered under-resourced for the successful application of deep learning methods. In this work, we propose a meta-learning approach to document classification in limited-resource setting and demonstrate its effectiveness in two different settings: few-shot, cross-lingual adaptation to previously unseen languages; and multilingual joint training when limited target-language data is available during training. We conduct a systematic comparison of several meta-learning methods, investigate multiple settings in terms of data availability and show that meta-learning thrives in settings with a heterogeneous task distribution. We propose a simple, yet effective adjustment to existing meta-learning methods which allows for better and more stable learning, and set a new state of the art on several languages while performing on-par on others, using only a small amount of labeled data.

该论文提出了一种元学习方法，可以在有限资源的情况下进行文档分类，并在少量标记数据的情况下取得了较好的效果，涉及跨语言、多语言的情况。作者还对多个元学习方法进行了比较和调整，提出了一种简单且有效的调整方式，并在多语言上取得了新的最佳表现。

多语言和跨语言文档分类：元学习方法