1. Statista, The most spoken languages worldwide in 2022, 2022, http://www.statistic.com, last accessed 2022/04/20.
2. Samarin, W. J.: Sociolinguistics: An international handbook of the science of language and society, Lingua Franca, Berlin: Walter de Gruyter, 1987, pp. 371–374.
3. Encalada, M. A. S., Sarmiento, S. M. A.: Perceptions about self-recording videos to develop EFL speaking skills in two Ecuadorian universities, Journal of Language Teaching and Research, 10(1), 2019, pp. 60–67.
4. Mann, S., Crichton, R., Edmett, A.: Evaluating the role of video in supporting reflection beyond INSET, Elsevier Publisher, 102195, 2020, https://doi.org/10.1016/j.system.2019.102195
5. Kayi, H.: Teaching speaking: Activities to promote speaking in a second language, The Internet TESL Journal, 12(11), 2006.