Challenge: Existing approaches to language-conditioned reinforcement learning in visual environments are limited by language semantics.
Approach: They propose a new benchmark for language-conditioned reinforcement learning in visual environments . they annotate 2,661 highly-compositional human-written natural language statements .
Outcome: The proposed approach is based on 2,661 highly-compositional human-written natural language statements grounded in an interactive visual environment.

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Challenge: Existing methods to parse natural language into structured logical expressions have limitations due to paucity of labeled data.
Approach: They propose a scoring model to automatically learn a model-based reward . they also propose introducing a Chinese-PL/FOL dataset to compensate for paucity of labeled data .
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Improving the Language Understanding Capabilities of Large Language Models Using Reinforcement Learning (2025.findings-emnlp)

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Challenge: Instruction-fine-tuned large language models (LLMs) under 14B parameters underperform on NLU tasks . we explore a framework to improve the NLU capabilities of LLMs .
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Deep Reinforcement Learning for NLP (P18-5)

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Challenge: Many natural language processing tasks can be formulated as deep reinforcement learning (DRL) problems.
Approach: This tutorial provides an introduction to the foundations of deep reinforcement learning . it describes recent advances in designing deep reinforcement for NLP .
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Mapping Language to Programs using Multiple Reward Components with Inverse Reinforcement Learning (2021.findings-emnlp)

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Challenge: Existing approaches focus on likelihood-based training or using reinforcement learning to fine-tune models based on a single reward.
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HER: Human-like Reasoning and Reinforcement Learning for LLM Role-playing (2026.findings-acl)

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Challenge: Existing models for LLM role-playing lack high-quality datasets with explicit reasoning traces and reliable reward signals aligned with human preferences.
Approach: They propose a unified framework for cognitive-level persona simulation that strictly distinguishes characters’ first-person thinking processes from LLMs’ third-person reasoning.
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Harnessing the Power of Large Language Models for Natural Language to First-Order Logic Translation (2024.acl-long)

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Challenge: Logic-based approaches to reasoning have lost popularity due to limited scalability and coverage.
Approach: They present a dataset of 28K sentence-level NL-FOL pairs from GPT4 and a LogicLLaMA2-7B/13B fine-tuned on MALLS for NL translation.
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Enhancing Reinforcement Learning with Label-Sensitive Reward for Natural Language Understanding (2024.acl-long)

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Challenge: Recent advances in large language models (LLMs) have yielded remarkable performance, but objective mismatch issues hinder RLHF learning.
Approach: They propose a Reinforcement Learning framework enhanced with Label-sensitive reward to enhance LLMs' alignment and generation capabilities.
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SURF: Semantic-level Unsupervised Reward Function for Machine Translation (2022.naacl-main)

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Challenge: Reinforcement Learning (RL) is dependent on the reward formulation due to the intrinsic difficulty of the task in the high-dimensional discrete action space and the sparseness of the standard reward functions.
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Arctic-Text2SQL-R1: Simple Rewards, Strong Reasoning in Text-to-SQL (2026.findings-acl)

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Challenge: Translating natural language questions into SQL is a core challenge in natural language understanding and human-computer interaction.
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MT-R1-Zero: Advancing LLM-based Machine Translation via R1-Zero-like Reinforcement Learning (2025.findings-emnlp)

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Challenge: Large-scale reinforcement learning (RL) methods have proven effective in enhancing the reasoning abilities of large language models.
Approach: They propose an open-source adaptation of the R1-Zero RL framework for machine translation (MT) their code is available at https://github.com/fzp0424/MT-R1-zero.
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