Is Bisaya a language? No. It is a language family consisting of languages spoken in the Visayas and northern Mindanao. Bisayan languages include Cebuano, Hiligaynon, Waray, Karay-a, and Surigaonon, among others. Cebuano is colloquially known as 'Bisaya.'
Records from the American period listed the said languages as Visayan-Cebuano, Visayan-Hiligayanon, etc. Took quite some time before Philippine languages (NOT dialects) had been properly classified by linguists and language experts.
For those looking for authoritative and credible information about language families and languages, those readily available at:
1. Ethnologue: https://www.ethnologue.com/ 
2. ISO 639: https://www.iso.org/iso-639-language-codes.html https://twitter.com/illegitiMAINE/status/1264180826083745793
https://twitter.com/jecondraysbak/status/1264191348451627009
https://twitter.com/jecondraysbak/status/1264203411806797824
https://twitter.com/jecondraysbak/status/1264409393933606912?s=19
Further clarification (if you want to read more): https://twitter.com/jecondraysbak/status/1264463500598001664?s=19
You can follow @jecondraysbak.
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