x1 is the 'ce ki tau jei' dialect of Lojban, used by x2 to communicate x3 (si'o/du'u)
Place structure based on bangu. Refers to a variant of the 'ce ki tau jau' (2 to communicate x3 (si'o/du'u)">tcekitaujau) dialect that differs on what jo'u is swapped with: see http://mw.lojban.org/papri/ce_ki_tau_jau. Use of this dialect can be marked with 'jo'au tcekitaujei'