In recent years, substantial advancements in pre-trained language models have paved the way for the development of numerous non-English language versions, with a particular focus on encoder-only and decoder-only architectures. While Spanish language models encompassing BERT, RoBERTa, and GPT have exhibited prowess in natural language understanding and generation, there remains a scarcity of encoder-decoder models designed for sequence-to-sequence tasks involving input-output pairs. This paper breaks new ground by introducing the implementation and evaluation of renowned encoder-decoder architectures, exclusively pre-trained on Spanish corpora. Specifically, we present Spanish versions of BART, T5, and BERT2BERT-style models and subject them to a comprehensive assessment across a diverse range of sequence-to-sequence tasks, spanning summarization, rephrasing, and generative question answering. Our findings underscore the competitive performance of all models, with BART and T5 emerging as top performers across all evaluated tasks. As an additional contribution, we have made all models publicly available to the research community, fostering future exploration and development in Spanish language processing.

本文介绍了在西班牙语语料库上预训练的著名编码器-解码器架构——BART、T5和BERT2BERT风格模型。通过对各种序列到序列任务（包括摘要、改写和生成式问答）的综合评估，我们发现所有模型的性能竞争力，其中BART和T5在所有评估任务中表现最好。此外，我们还将所有模型公开提供给研究社区，促进西班牙语语言处理领域的未来探索和发展。

序列到序列的西班牙语预训练语言模型