Hi Cecilia-Irene Loeza-Mejía , I am far from an expert in spoken-language analyses but found some resources that might be helpful or even contain what you are looking for:

http://festvox.org/cmu_wilderness/

https://www.openslr.org/resources.php

https://discuss.huggingface.co/t/nahuatl-fine-tuning-wav2vec/5101

Good luck with your research!

Annika provided good resources. I would like to make some addition : https://www.kdnuggets.com/2021/05/awesome-list-datasets.html

https://researchers.cdu.edu.au/en/datasets/living-archive-of-aboriginal-languages