Epi has somewhere from 6 to 9 languages, depending on how you classify them. Kelai might be known as something else on other parts of Epi.
For instance, on Pentecost,
gorogoro (Sa language),
borogu (Apma language) and
borongoru/boroguru (Raga langugage) are cognates. Barring local mutations, they are probably all the same cultivar. Likewise, the "Pentecost" grown on Tanna is surely named after a popular Pentecost kava. And I would not be too surprised if "Vila" as grown in Southern Vanuatu is the same thing as "Smol Han" on Efate... which is none other than the famous puariki of the Shepherds known by another name.
This PHAMA document
http://phama.com.au/wp-content/uploads/2017/07/Vanuatu_Quality_Standard_ecopy.pdf
shows that kelai is also known as miaome.
Mia and
miau are the generic words for "kava" in Lamenu and Lewo, respectively. Lamenu is spoken on the very northern tip of Epi. Lewo stretches along the entire long coast that faces Paama and Lopevi. "Mel" is another very common cognate for generic kava, so "miaomwe" might even be a combination of several common words for kava from neighboring languages.