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 103480--103481
[]\TU/LinuxBiolinumO(0)/b/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (Coatecas 
Altas Zapotec language)

Underfull \hbox (badness 10000) in paragraph at lines 103502--103503
[]\TU/LinuxBiolinumO(0)/b/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (Sierra de
 Juárez Zapotec language)

Underfull \hbox (badness 6252) in paragraph at lines 103504--103505
[]\TU/LinuxBiolinumO(0)/b/n/10 Zapotec\TU/LinuxLibertineO(0)/m/it/10 (San Juan 
Guelavía Zapotec language)

Underfull \hbox (badness 2261) in paragraph at lines 103538--103539
[]\TU/LinuxBiolinumO(0)/b/n/10 Zealandia\TU/LinuxLibertineO(0)/m/it/10 (contine
nt/continental plate) \TU/LinuxLibertineO(0)/m/n/10 tumrzilan-
[1017]
Underfull \hbox (badness 1199) in paragraph at lines 103608--103609
[]\TU/LinuxBiolinumO(0)/b/n/10 Zhoukoudian\TU/LinuxLibertineO(0)/m/it/10 (paleo
lithic industry (archaeological

Underfull \hbox (badness 10000) in paragraph at lines 103632--103633
[]\TU/LinuxBiolinumO(0)/b/n/10 Zhuang\TU/LinuxLibertineO(0)/m/it/10 (Eastern Ho
ngshuihe Zhuang language)

Underfull \hbox (badness 10000) in paragraph at lines 103634--103635
[]\TU/LinuxBiolinumO(0)/b/n/10 Zhuang\TU/LinuxLibertineO(0)/m/it/10 (Central Ho
ngshuihe Zhuang language)
[1018]
Underfull \hbox (badness 10000) in paragraph at lines 103740--103741
[]\TU/LinuxBiolinumO(0)/b/n/10 Zulgo-Gemzek\TU/LinuxLibertineO(0)/m/it/10 (Zulg
o-Gemzek language) \TU/LinuxLibertineO(0)/m/n/10 baur-
[1019] (./_inA4VL9hj.aux)

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

 )
(see the transcript file for additional information)
Output written on _inA4VL9hj.pdf (1019 pages).
Transcript written on _inA4VL9hj.log.