我正在尝试在 LaTeX 模板中配置西里尔文（即俄语）。我成功下载了模板，如下所示：LaTeX 书籍模板依赖文件
我对模板做的唯一更改是在文件中main.tex，下面显示了代码片段：
%----------------------------------------------------------------------------------------
% PACKAGES AND OTHER DOCUMENT CONFIGURATIONS
%----------------------------------------------------------------------------------------
\documentclass[11pt,fleqn]{book} % Default font size and left-justified equations
\usepackage[top=3cm,bottom=3cm,left=3.2cm,right=3.2cm,headsep=10pt,letterpaper]{geometry} % Page margins
\usepackage{fontspec} % loaded by polyglossia, but included here for transparency
\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{russian}
%\newfontfamily\russianfont[Script=Cyrillic]{Linux Libertine}
\usepackage{xcolor} % Required for specifying colors by name
\definecolor{ocre}{RGB}{52,177,201} % Define the orange color used for highlighting throughout the book
% Font Settings
\usepackage{avant} % Use the Avantgarde font for headings
%\usepackage{times} % Use the Times font for headings
\usepackage{mathptmx} % Use the Adobe Times Roman as the default text font together with math symbols from the SymÂbol, Chancery and ComÂputer Modern fonts
\usepackage{microtype} % Slightly tweak font spacing for aesthetics
\usepackage[utf8]{inputenc} % Required for including letters with accents
\usepackage[T1]{fontenc} % Use 8-bit encoding that has 256 glyphs
% Bibliography
\usepackage[style=alphabetic,sorting=nyt,sortcites=true,autopunct=true,babel=hyphen,hyperref=true,abbreviate=false,backref=true,backend=biber]{biblatex}
\addbibresource{bibliography.bib} % BibTeX bibliography file
\defbibheading{bibempty}{}
\input{structure} % Insert the commands.tex file which contains the majority of the structure behind the template
\begin{document}
%----------------------------------------------------------------------------------------
% TITLE PAGE
%----------------------------------------------------------------------------------------
\begingroup
\thispagestyle{empty}
\AddToShipoutPicture*{\put(0,0){\includegraphics[scale=1.25]{esahubble}}} % Image background
\centering
\vspace*{5cm}
\par\normalfont\fontsize{35}{35}\sffamily\selectfont
\textbf{Привет}\\
{\LARGE Data Mining and Machine Learning in Astronomy}\par % Book title
\vspace*{1cm}
{\Huge Andrea Hidalgo}\par % Author name
\endgroup
如您所见，我在文件底部添加了一个俄语单词，并尝试在文件顶部设置俄语。到目前为止，我尝试了以下选项：如何在 LaTeX (LEd) 中包含俄语？和(La)TeX 中的西里尔字母。我从这两个现有问题中尝试了几个不同的选项。
我似乎遇到了一个问题babel，类似这样的问题：俄语和英语的 babel。具体来说，编译器不喜欢我的structure.tex文件中的这一特定行：\usepackage[english]{babel} % English language/hyphenation。我尝试russian在其范围内指定，但这并不能解决我的问题。
有人能帮我为我的模板配置俄语吗？我不明白为什么这些选项对我来说都不起作用（到目前为止）。
编辑
另一个 MWE 使用此处提供的建议：https://www.sharelatex.com/learn/俄语
%----------------------------------------------------------------------------------------
% PACKAGES AND OTHER DOCUMENT CONFIGURATIONS
%----------------------------------------------------------------------------------------
\documentclass[11pt,fleqn]{book} % Default font size and left-justified equations
\usepackage[top=3cm,bottom=3cm,left=3.2cm,right=3.2cm,headsep=10pt,letterpaper]{geometry} % Page margins
\usepackage{xcolor} % Required for specifying colors by name
\definecolor{ocre}{RGB}{52,177,201} % Define the orange color used for highlighting throughout the book
% Font Settings
\usepackage{avant} % Use the Avantgarde font for headings
%\usepackage{times} % Use the Times font for headings
\usepackage{mathptmx} % Use the Adobe Times Roman as the default text font together with math symbols from the SymÂbol, Chancery and ComÂputer Modern fonts
\usepackage{microtype} % Slightly tweak font spacing for aesthetics
\usepackage[utf8]{inputenc} % Required for including letters with accents
\usepackage[T2A]{fontenc} % Use 8-bit encoding that has 256 glyphs
\usepackage[russian]{babel}
% Bibliography
\usepackage[style=alphabetic,sorting=nyt,sortcites=true,autopunct=true,babel=hyphen,hyperref=true,abbreviate=false,backref=true,backend=biber]{biblatex}
\addbibresource{bibliography.bib} % BibTeX bibliography file
\defbibheading{bibempty}{}
\input{structure} % Insert the commands.tex file which contains the majority of the structure behind the template