The Greek and Hebrew that is translated with “mule” in English is translated in Swahili with nyumbu which also is a homonym for “wildebeest,” potentially causing confusion.
In Kutu it is translated with “big donkey” because there is no other adequate term in Kutu. (Source: Pioneer Bible Translators, project-specific translation notes in Paratext)
In the Hausa Common Language Bible it is translated jakin-doki or “donkey-horse,” since mules are also not known in Nigeria. (Source: Andy Warren-Rothlin)