Fine PT-PT Web: A High-Quality 41 Billion Tokens Data Collection of the European Portuguese Web

• URL: http://arxiv.org/abs/2609.07699v2
• Date: Wed, 09 Sep 2026 09:54:04 GMT
• Title: Fine PT-PT Web: A High-Quality 41 Billion Tokens Data Collection of the European Portuguese Web
• Abstract summary: Curating Web corpora for regional language variants like European Portuguese (PT-PT) is heavily bottlenecked by dialectal overlap.<n>This paper presents an efficient pipeline to curate a production-ready PT-PT corpus from the Portuguese Web, spanning 411 TB of raw data from Arquivo.pt.
• Score: 5.590778585275515
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Curating Web corpora for regional language variants like European Portuguese (PT-PT) is heavily bottlenecked by dialectal overlap (mainly with PT-BR) and data processing scale. This paper presents an efficient pipeline to curate a production-ready PT-PT corpus from the Portuguese Web, spanning 411 TB of raw data from Arquivo.pt. We introduce a novel post-scraping block that removes boilerplate and line duplicates prior to filtering. This early-stage intervention increases final document yield by 19.04% by rescuing valid text that standard heuristic filters prematurely discard. Integrated with rigorous language identification, weighted fuzzy deduplication, and neural quality classification, our pipeline offers a scalable framework and a clean, representative corpus optimized for LLM pre-training.

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