PDF GENERATION PROBABLY FAILED.

Here's several lines of context for each line that appears to have an error:

Line :

Note that the real issue is often at the end of the last line of real data *before* the line number I just reported; you should check there first.

Line , +/- 5:

{\sffamily\bfseries π(n)}\markboth{π(n)}{π(n)} pi'ei'au

{\sffamily\bfseries сafetière à piston}\markboth{сafetière à piston}{сafetière à piston}\textit{(french press)}  da'erju'ebo'i

\end{document}

%!TEX encoding = UTF-8 Unicode
%!TEX TS-program = xelatex
\documentclass[notitlepage,twocolumn,a4paper,10pt]{book}
\renewcommand\chaptername{ni'o ni'o}

Here's the end of the output from the PDF generation; this can be helpful in spotting errors. You can see the complete output by viewing the source of this page and searching for "with output:".

Underfull \hbox (badness 10000) in paragraph at lines 103182--103183
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (Quioquit
ani-Quierí Zapotec language)
[1012]
Underfull \hbox (badness 10000) in paragraph at lines 103204--103205
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (Southern
 Rincon Zapotec language)

Underfull \hbox (badness 10000) in paragraph at lines 103206--103207
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (Coatecas
 Altas Zapotec language)

Underfull \hbox (badness 2261) in paragraph at lines 103232--103233
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zealandia\TU/LinuxLibertineO(0)/m/it/10 (contin
ent/continental plate) \TU/LinuxLibertineO(0)/m/n/10 tumrzilan-

Underfull \hbox (badness 1194) in paragraph at lines 103304--103305
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zhoukoudian\TU/LinuxLibertineO(0)/m/it/10 (pale
olithic industry (archaeological

Underfull \hbox (badness 10000) in paragraph at lines 103322--103323
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zhuang\TU/LinuxLibertineO(0)/m/it/10 (Eastern H
ongshuihe Zhuang language)

Underfull \hbox (badness 10000) in paragraph at lines 103324--103325
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zhuang\TU/LinuxLibertineO(0)/m/it/10 (Central H
ongshuihe Zhuang language)
[1013]
Underfull \hbox (badness 10000) in paragraph at lines 103434--103435
[]\TU/LinuxBiolinumO(0)/bx/n/10 Zulgo-Gemzek\TU/LinuxLibertineO(0)/m/it/10 (Zul
go-Gemzek language) \TU/LinuxLibertineO(0)/m/n/10 baur-
[1014] (./TKnq2xGsib.aux)

LaTeX Font Warning: Some font shapes were not available, defaults substituted.

 )
(see the transcript file for additional information)
Output written on TKnq2xGsib.pdf (1014 pages).
Transcript written on TKnq2xGsib.log.