bau _BAI cmavo

bangu modal, 1st place in language ...

On affix form:

bangu: x₁ is a/the language/dialect used by x₂ to express/communicate x₃ (si'o/du'u, not quote).

In notes:

terkemseldumterbau: x₁ is a language/dialect used by x₂ to express/communicate x₃ (text, not clause)
do'au: pro-sumti whose referent's identity may be chosen by the listener
ja'u: na'e fancuka modal: no matter (indirect question)...
xo'i: Extracts selbri from a tag, inverse of fi'o
traduki: x₁ translates x₂ (source) into x₃ (result/product)