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Astrid Bernaga

Work · ACL 2025, main conference

Fairer answers, whatever English you speak

Ask a chatbot about a privacy policy in a different variety of English and its answers get worse. We built two cooperating AI agents that close most of that gap, without retraining the model.

50English dialects tested
2agents, no retraining or fine-tuning
0.093 → 0.019gap between dialects, GPT-4o-mini on PrivacyQA
Up to 82%smaller gap across the models tested
01

The problem

The same question, "Do you sell my data?", gets a better answer in standard American English than in other varieties of English. People who rely on these tools to understand how their data is used get a worse explanation of their own rights.

Standard American0.394
Southwest England0.301

Answer quality (F1, higher is better), GPT-4o-mini on PrivacyQA, before our framework. Standard American English scored best and the Southwest England dialect lowest: a gap of 0.093. The dialect versions of each question were generated with Multi-VALUE, a rule-based dialect translation tool.

02

What we built

A pipeline of two agents that works on top of any existing model.

  1. The questionIn any variety of English.
  2. Dialect agentTranslates it into standard American English, keeping what the person meant.
  3. Privacy policy agentAnswers using only the relevant part of the privacy policy.
  4. Agreement checkThe dialect agent checks that the answer addresses the original question.

↺ If it does not, the privacy policy agent revises its answer, up to 2 times.

03

The result

Before0.093
With the framework0.019

Gap between the best and the worst dialect, GPT-4o-mini on PrivacyQA, lower is better: 80% smaller, and answers improved for every dialect. Across the three models tested, the paper reports gaps up to 82% smaller. On PolicyQA, where the gap was already small, it went from 0.029 to 0.024.

04

Our work

With the University of Texas at San Antonio and Tecnológico de Monterrey, we designed the two-agent framework and tested it on two privacy datasets (PrivacyQA and PolicyQA), three models (GPT-4o-mini, Llama 3.1 and DeepSeek-R1) and 50 English dialects. I am a co-author of the paper.

Đorđe Klisura, Astrid R. Bernaga Torres, Anna Karen Gárate-Escamilla, Rajesh Roshan Biswal, Ke Yang, Hilal Pataci and Anthony Rios. ACL 2025, main conference.

Astrid Bernaga pointing to a results chart on a research poster
Presenting our research at the UTSA School of Data Science summer research program, 2024.
Astrid Bernaga on stage in the Scholar Experience Townhall panel at the UTSA School of Data Science
Scholar Experience Townhall panel, UTSA School of Data Science, 2024.