Detecting hyperpartisan narratives and Population Replacement Conspiracy Theories (PRCT) is essential to addressing the spread of misinformation. These complex narratives pose a significant threat, as hyperpartisanship drives political polarisation and institutional distrust, while PRCTs directly motivate real-world extremist violence, making their identification critical for social cohesion and public safety. However, existing resources are scarce, predominantly English-centric, and often analyse hyperpartisanship, stance, and rhetorical bias in isolation rather than as interrelated aspects of political discourse. To bridge this gap, we introduce PartisanLens, the first multilingual dataset of 1617 hyperpartisan news headlines in Spanish, Italian, and Portuguese, annotated in multiple political discourse aspects. We first evaluate the classification performance of widely used Large Language Models (LLMs) on this dataset, establishing robust baselines for the classification of hyperpartisan and PRCT narratives. In addition, we assess the viability of using LLMs as automatic annotators for this task, analysing their ability to approximate human annotation. Results highlight both their potential and current limitations. Next, moving beyond standard judgments, we explore whether LLMs can emulate human annotation patterns by conditioning them on socio-economic and ideological profiles that simulate annotator perspectives. At last, we provide our resources and evaluation; PartisanLens supports future research on detecting partisan and conspiratorial narratives in European contexts.

Online discussions can either bridge differences through constructive dialogue or amplify divisions through destructive interactions. paper proposes a computational approach to analyze dialogical relation patterns in YouTube comments, offering a fine-grained framework for controversy detection, enabling also analysis of individual contributions. experiments demonstrate that shallow learning methods, when equipped with these theoretically-grounded features, consistently outperform more complex language models in characterizing discourse quality at both comment-pair and conversation-chain levels.studies confirm that divisive rhetorical techniques serve as strong predictors of destructive communication patterns. work advances understanding of how communicative choices shape online discourse, moving beyond engagement metrics toward nuanced examination of constructive versus destructive dialogue patterns.

Les parseurs de discours ont suscité un intérêt considérable dans les récentes applications de traitement automatique du langage naturel. Cette approche dépasse les limites traditionnelles de la phrase et peut s’étendre pour englober l’identification de relation de discours. Il existe plusieurs parseurs spécialisés dans le traitement autmatique du discours, mais ces derniers ont été principalement évalués sur des corpus anglais. Par conséquent, il n’est pas évident de bien cerner les éléments linguistiques importants sur lesquels les parseurs se basent pour classifier les relations de discours en dehors de l’anglais. Cet article évalue les performances du parseur DMRST sur le corpus RST-DT traduit en français. Nous constatons que les performances de classification des relations de discours en français sont comparables à celles obtenues pour d’autres langues. En analysant les succès et échecs de la classification des relations, nous soulignons l’impact des marqueurs de discours et des structures syntaxiques sur la précision du parseur.