IEEEtran 类中的 babel 字幕问题

Question

我正在使用 babel 包在英文 IEEE 文章中使用波斯语字符：

\documentclass[conference]{IEEEtran}
\usepackage[utf8]{inputenc}
\usepackage[arabic,farsi,main=english]{babel}
\renewcommand{\thesection}{\Roman{section}}
\renewcommand{\thesubsection}{\Alph{subsection}}
\renewcommand{\thesubsubsection}{\arabic{subsubsection}}

\title{Former Title}

\author{
    \IEEEauthorblockN{Author1, Name1; Surname1, Name1}
    \IEEEauthorblockA{[email protected], [email protected]}
}

\begin{document}
    
        \maketitle
        \begin{abstract}
            Here's where you place the "abstract"
        \end{abstract}
    \section{introduction}
    some Persian text \FR{فروشگاه}
    
    \begin{table}[!t]
    % increase table row spacing, adjust to taste
    \renewcommand{\arraystretch}{1.3}
    \caption{An Example of a Table}
    \label{table_example}
    \centering
    \begin{tabular}{|c||c|}
    \hline
    One & Two\\
    \hline
    Three & Four\\
    \hline
    \end{tabular}
    \end{table}
\end{document}

但是我在使用表格标题时遇到这个错误：

Undefined control sequence. \caption
Missing number, treated as zero. \caption

此外，我在章节和小节中也遇到了同样的错误，但我用\更新命令但我无法对标题使用相同的解决方案。

我正在使用 texLive2021 和 PdfLatex 编译器。

Answer 1

感谢 Ulrike Fischer，问题已解决。最好不要使用 babel，只更改字体和方向，如下所示：

阿拉伯

应该使用 LAE 字体编码。

\documentclass[conference]{IEEEtran}
\usepackage[utf8]{inputenc}
\usepackage[LAE,T1]{fontenc}

\title{Former Title}

\author{
    \IEEEauthorblockN{Author1, Name1; Surname1, Name1}
    \IEEEauthorblockA{[email protected], [email protected]}
}
\TeXXeTstate=1
\begin{document}
    
    \maketitle
    \begin{abstract}
        Here's where you place the "abstract"
    \end{abstract}
    
    \section{introduction}
    
    While were are using
    \bgroup\beginR\fontencoding{LAE}
    \selectfont سلام \endR\egroup 
    This is a simple text.
    
    \begin{table}[!t]
        % increase table row spacing, adjust to taste
        \renewcommand{\arraystretch}{1.3}
        \caption{An Example of a Table}
        \label{table_example}
        \centering
        \begin{tabular}{|c||c|}
            \hline
            One & Two\\
            \hline
            Three & Four\\
            \hline
        \end{tabular}
    \end{table}
\end{document}

波斯语

应使用 LFE：

\documentclass[conference]{IEEEtran}
\usepackage[utf8]{inputenc}
% LFE should be imported with LAE or you will face error.
\usepackage[LFE,LAE,T1]{fontenc}

\title{Former Title}

\author{
    \IEEEauthorblockN{Author1, Name1; Surname1, Name1}
    \IEEEauthorblockA{[email protected], [email protected]}
}
    \TeXXeTstate=1
\begin{document}
    
        \maketitle
        \begin{abstract}
            Here's where you place the "abstract"
        \end{abstract}
    
    \section{introduction}

        While were are using
        \bgroup\beginR\fontencoding{LFE}
        \selectfont متن فارسی \endR\egroup 
         This is not applicable
    
    \begin{table}[!t]
    % increase table row spacing, adjust to taste
    \renewcommand{\arraystretch}{1.3}
    \caption{An Example of a Table}
    \label{table_example}
    \centering
    \begin{tabular}{|c||c|}
    \hline
    One & Two\\
    \hline
    Three & Four\\
    \hline
    \end{tabular}
    \end{table}
\end{document}