Posted: Nov 13, 2017 10:45 pm
by Papa Smurf
Google says:

https://linguistics.stackexchange.com/q ... side-quech
https://linguistics.stackexchange.com/questions/1380/are-there-languages-with-a-totally-regular-conjugation-for-to-be-outside-quech wrote:So far, I found only one language that fulfills the requirement, Quechua, with the verb "Kay":


Some of the comments are interesting, seems like there might be some other cases.