x1 is the "ce ki tau jau" dialect of Lojban, used by x2 to communicate x3 (si'o/du'u)
Place structure based on bangu. Refers to a dialect of Lojban that swaps certain longer, common, cmavo with shorter, rarer, cmavo: see http://mw.lojban.org/papri/ce_ki_tau_jau. Use of this dialect can be marked with "jo'au tcekitaujau". Also see tcekitaujei.