当我在 Word 中预先写好论文时，我很乐意将其直接复制并粘贴到 Kile 中。如果直接在 Kile 中使用类似工具进行写作，\"u文本会显得没有条理。
我知道一些使用的方法\inputenc，但是由于我使用的是 XeLaTeX，所以这种方法不起作用。
还有其他方式可以写吗ä或者ü直接写吗？
我已经尝试使用\usepackage[T1]{fontenc}，但没有显示字符。
序言中我的部分内容：
%---------------------------------------------------------------------------- ------------
% Encoding und Language
%----------------------------------------------------------------------------------------
\XeTeXinputencoding latin1
\usepackage[T1]{fontenc}
\usepackage{polyglossia}
\setdefaultlanguage[spelling=new]{german}
\setotherlanguage{english}
\usepackage{csquotes}
%----------------------------------------------------------------------------------------
% Fonts
%----------------------------------------------------------------------------------------
\usepackage{fontspec}
预先感谢您的帮助。
编辑：
新 MWE：
\documentclass[10pt]{article}
\usepackage{fontspec}
\begin{document}
test äö ß dfß ü
\end{document}
使用 XeLaTeX 编译，输出 PDF 仅显示Test不带特殊字符
完整日志：
This is XeTeX, Version 3.14159265-2.6-0.999991 (MiKTeX 2.9.7250 64-bit) (preloaded format=xelatex 2020.1.16) 21 JAN 2020 21:37
entering extended mode
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LaTeX Font Info: Redeclaring math accent \hat on input line 10.
LaTeX Font Info: Redeclaring math accent \dot on input line 10.
LaTeX Font Info: Redeclaring math accent \mathring on input line 10.
LaTeX Font Info: Redeclaring math symbol \colon on input line 10.
LaTeX Font Info: Redeclaring math symbol \Gamma on input line 10.
LaTeX Font Info: Redeclaring math symbol \Delta on input line 10.
LaTeX Font Info: Redeclaring math symbol \Theta on input line 10.
LaTeX Font Info: Redeclaring math symbol \Lambda on input line 10.
LaTeX Font Info: Redeclaring math symbol \Xi on input line 10.
LaTeX Font Info: Redeclaring math symbol \Pi on input line 10.
LaTeX Font Info: Redeclaring math symbol \Sigma on input line 10.
LaTeX Font Info: Redeclaring math symbol \Upsilon on input line 10.
LaTeX Font Info: Redeclaring math symbol \Phi on input line 10.
LaTeX Font Info: Redeclaring math symbol \Psi on input line 10.
LaTeX Font Info: Redeclaring math symbol \Omega on input line 10.
LaTeX Font Info: Redeclaring math symbol \mathdollar on input line 10.
LaTeX Font Info: Redeclaring symbol font `operators' on input line 10.
LaTeX Font Info: Encoding `OT1' has changed to `TU' for symbol font
(Font) `operators' in the math version `normal' on input line 10.
LaTeX Font Info: Overwriting symbol font `operators' in version `normal'
(Font) OT1/cmr/m/n --> TU/lmr/m/n on input line 10.
LaTeX Font Info: Encoding `OT1' has changed to `TU' for symbol font
(Font) `operators' in the math version `bold' on input line 10.
LaTeX Font Info: Overwriting symbol font `operators' in version `bold'
(Font) OT1/cmr/bx/n --> TU/lmr/m/n on input line 10.
LaTeX Font Info: Overwriting symbol font `operators' in version `normal'
(Font) TU/lmr/m/n --> TU/lmr/m/n on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `normal'
(Font) OT1/cmr/m/it --> TU/lmr/m/it on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathbf' in version `normal'
(Font) OT1/cmr/bx/n --> TU/lmr/bx/n on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `normal'
(Font) OT1/cmss/m/n --> TU/lmss/m/n on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `normal'
(Font) OT1/cmtt/m/n --> TU/lmtt/m/n on input line 10.
LaTeX Font Info: Overwriting symbol font `operators' in version `bold'
(Font) TU/lmr/m/n --> TU/lmr/bx/n on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `bold'
(Font) OT1/cmr/bx/it --> TU/lmr/bx/it on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `bold'
(Font) OT1/cmss/bx/n --> TU/lmss/bx/n on input line 10.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `bold'
(Font) OT1/cmtt/m/n --> TU/lmtt/bx/n on input line 10.
Invalid UTF-8 byte or sequence at line 11 replaced by U+FFFD.
Invalid UTF-8 byte or sequence at line 11 replaced by U+FFFD.
Invalid UTF-8 byte or sequence at line 11 replaced by U+FFFD.
Invalid UTF-8 byte or sequence at line 11 replaced by U+FFFD.
Invalid UTF-8 byte or sequence at line 11 replaced by U+FFFD.
Missing character: There is no � in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no � in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no � in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no � in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no � in font [lmroman10-regular]:mapping=tex-text;!
[1
] (Test.aux) )
Here is how much of TeX's memory you used:
17903 strings out of 427233
361810 string characters out of 3141341
451671 words of memory out of 3000000
22419 multiletter control sequences out of 15000+200000
532386 words of font info for 30 fonts, out of 3000000 for 9000
1348 hyphenation exceptions out of 8191
45i,10n,42p,321b,2146s stack positions out of 5000i,500n,10000p,200000b,50000s
Output written on Test.pdf (1 page).
答案1
删除这些行
\XeTeXinputencoding latin1
\usepackage[T1]{fontenc}
第一个使输入为 latin1，而不是 xetex 和本网站几乎其他任何地方的默认 UTF-8。在 xetex 中使用 latin1 很棘手，而且完全没有必要，当您从其他系统（例如本网站上的示例）剪切和粘贴文本时，它通常会以 utf-8 的形式呈现。
切勿将其与 xelatex 一起使用\usepackage[T1]{fontenc}，因为 xelatex 会强制使用传统的 8 位字体，从而抵消 xetex 的大部分优势（即可以访问 Unicode 字体），而且连字符转换也将不正确，因为 xelatex 格式不会加载用于 T1 编码的连字表。
如果没有这些行，您将获得 UTF-8 输入和 Unicode（TU）编码字体的默认行为，因此 ä 和 ü 可以用作普通字符。
\documentclass{article}
\begin{document}
so ä and ü can just be used as normal characters.
\end{document}
