Ancestor-to-Creole Transfer is Not a Walk in the Park

Heather Lent, Emanuele Bugliarello, Anders Søgaard


Abstract
We aim to learn language models for Creole languages for which large volumes of data are not readily available, and therefore explore the potential transfer from ancestor languages (the ‘Ancestry Transfer Hypothesis’). We find that standard transfer methods do not facilitate ancestry transfer. Surprisingly, different from other non-Creole languages, a very distinct two-phase pattern emerges for Creoles: As our training losses plateau, and language models begin to overfit on their source languages, perplexity on the Creoles drop. We explore if this compression phase can lead to practically useful language models (the ‘Ancestry Bottleneck Hypothesis’), but also falsify this. Moreover, we show that Creoles even exhibit this two-phase pattern even when training on random, unrelated languages. Thus Creoles seem to be typological outliers and we speculate whether there is a link between the two observations.
Anthology ID:
2022.insights-1.9
Volume:
Proceedings of the Third Workshop on Insights from Negative Results in NLP
Month:
May
Year:
2022
Address:
Dublin, Ireland
Editors:
Shabnam Tafreshi, João Sedoc, Anna Rogers, Aleksandr Drozd, Anna Rumshisky, Arjun Akula
Venue:
insights
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
68–74
Language:
URL:
https://aclanthology.org/2022.insights-1.9
DOI:
10.18653/v1/2022.insights-1.9
Bibkey:
Cite (ACL):
Heather Lent, Emanuele Bugliarello, and Anders Søgaard. 2022. Ancestor-to-Creole Transfer is Not a Walk in the Park. In Proceedings of the Third Workshop on Insights from Negative Results in NLP, pages 68–74, Dublin, Ireland. Association for Computational Linguistics.
Cite (Informal):
Ancestor-to-Creole Transfer is Not a Walk in the Park (Lent et al., insights 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.insights-1.9.pdf