Challenge: Existing methods for unsupervised text style transfer lack parallel data and difficulties in content preservation.
Approach: They propose a neural approach to unsupervised text style transfer using non-parallel data.
Outcome: The proposed approach can be trained end-to-end on two widely-used public datasets.

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Style Transformer: Unpaired Text Style Transfer without Disentangled Latent Representation (P19-1)

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Challenge: Disentangling the content and style in the latent space is prevalent in text style transfer . recurrent neural networks (RNN) based encoder and decoder cannot deal with the long-term dependency .
Approach: They propose a style transformer which disentangles style information in latent space . they propose encoding and decoding methods that disentangle style information .
Outcome: The proposed method can achieve better style transfer and better content preservation.
Towards Robust and Semantically Organised Latent Representations for Unsupervised Text Style Transfer (2022.naacl-main)

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Challenge: Recent studies show that auto-encoders perform language generation, smooth sentence interpolation, and style transfer over unseen attributes using unlabelled datasets in a zero-shot manner.
Approach: They propose a discrete token-based perturbation approach to map "similar" sentences close by in latent space.
Outcome: The proposed model can generate and perform language generation, style transfer and sentence interpolation tasks on unlabelled datasets in a zero-shot manner.
Rethinking Style Transformer with Energy-based Interpretation: Adversarial Unsupervised Style Transfer using a Pretrained Model (2022.emnlp-main)

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Challenge: Existing methods to train text style transfer models with adversarial loss degrade fluency compared to other metrics.
Approach: They propose a method which leverages a pretrained language model to improve fluency by restructuring the discriminator and the model itself.
Outcome: The proposed model achieves state-of-the-art on three public benchmarks and achieved state-outperformance on the overall metrics.
Revisiting Adversarial Autoencoder for Unsupervised Word Translation with Cycle Consistency and Improved Training (N19-1)

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Challenge: Recent work has shown superior performance for non-adversarial methods in more challenging language pairs.
Approach: They propose to use adversarial autoencoder to map monolingual embeddings to a shared space and to put the target encoders as an adversary against the corresponding discriminator.
Outcome: The proposed method is more robust and achieves better performance than previously proposed adversarial and non-adversarial methods.
Text Style Transferring via Adversarial Masking and Styled Filling (2022.emnlp-main)

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Challenge: Existing models for text style transfer suffer from two challenges: the word masking procedure may mistakenly remove unexpected words and the selected words in the word filling procedure lack diversity and semantic consistency.
Approach: They propose a style transfer model with adversarial masking and styled filling techniques to solve these challenges.
Outcome: The proposed model performs well on two benchmark text style transfer data sets.
So Different Yet So Alike! Constrained Unsupervised Text Style Transfer (2022.acl-long)

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Challenge: Automated transfer of text between domains does not maintain other attributes between the source and translated text.
Approach: They propose a method for automatic transfer of text between domains that preserves semantic content but changes other attributes.
Outcome: The proposed method retains lexical, syntactic and domain-specific constraints between domains for multiple benchmark datasets, including ones where more than one attribute change.
Disentangled Representation Learning for Non-Parallel Text Style Transfer (P19-1)

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Challenge: a paper aims to disentangle latent representations of style and content in language models . auxiliary multi-task and adversarial objectives are used to disentangle the latent space .
Approach: They propose a simple yet effective approach to disentangling latent representations . they propose auxiliary multi-task and adversarial objectives to disentangle style and content .
Outcome: The proposed approach achieves high performance in terms of transfer accuracy, content preservation, and language fluency compared to previous approaches .
Contextual Text Style Transfer (2020.findings-emnlp)

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Challenge: Existing methods for text style transfer are limited by the lack of parallel data.
Approach: They propose a task to translate a sentence into a desired style with its surrounding context taken into account.
Outcome: The proposed model outperforms state-of-the-art methods across style accuracy, content preservation and contextual consistency metrics.
Style Transfer Through Back-Translation (P18-1)

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Challenge: a new method for automatic style transfer is proposed to preserve the meaning of the text while reducing stylistic properties.
Approach: They propose a method for automatic style transfer that uses latent representations of the input sentence to preserve meaning while reducing stylistic properties.
Outcome: The proposed method improves on sentiment, gender and political slant styles on three different styles.
Fighting Offensive Language on Social Media with Unsupervised Text Style Transfer (P18-2)

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Challenge: Existing methods to tackle the problem of offensive language in social media are based on machine learning.
Approach: They propose a method for training encoder-decoders using non-parallel data . they use a collaborative classifier, attention and the cycle consistency loss .
Outcome: The proposed method outperforms state-of-the-art text style transfer systems on Twitter and Reddit . it produces reliable non-offensive transferred sentences, the authors show .

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