Bawm build with bamboo and thatch in their mountainous forests. They made the apostles and prophets become the roof ridge pole and Jesus the central uprights which support it. I asked why not the corner uprights since Greek has a term that is translated in English as ‘cornerstone.’ Bawm translators responded that the central uprights are more important than the corner ones, and Greek refers to the most important stone. (“Corner uprights” used in 1Tim 3:15.) (Source: David Clark)

In Mono, translators used “main post,” in Martu Wangka “two forked sticks with another long strong stick laid across” (see also 1 Peter 2:6-7.), and in Arrernte, the translation in 1Pet 2:7 (in English translation: “the stone . . . became the very cornerstone”) was rendered as “the foundation… continues to be the right foundation.” (Source for this and two above: Carl Gross)

Likewise, in Uripiv it also is the “post” (source: Ross McKerras) as well as in Sabaot (source Jim Leonhard in Holzhausen / Riderer 2010, p. 50)

In Ixcatlán Mazatec it is translated with a term denoting the “the principal part of the ‘house’ (or work)” (Source: Robert Bascom) and in Enlhet as “like the house-root” (source: Jacob Loewen in The Bible Translator 1969, p. 24ff.)

See also rock / stone, foundation on rock, and foundation.