3

That's a bug in biblatex v3.15 and v3.15a related to https://github.com/plk/biblatex/issues/945. It will be fixed in biblatex v3.15b, which will hopefully be ready in the not-too-distant future. For now you can manually define the undefined toggles that might be used (in your case the for the fallback emglish and for vietnamese). \documentclass{book} %\...


3

With polyglossia, the first indentation is set on a language by language basis. \documentclass{article} \usepackage{polyglossia} \setmainlanguage{portuguese} \usepackage{lipsum} \SetLanguageKeys{portuguese}{indentfirst=true} \title{Material de Matemática para o terceiro ano} \author{Eu} \date{\today} \begin{document} \maketitle \section{Introdução} \...


2

This is the bug reported in https://github.com/reutenauer/polyglossia/issues/421 (and https://github.com/josephwright/csquotes/issues/44). The issue has already been fixed in the development version of polyglossia available on GitHub (https://github.com/reutenauer/polyglossia), but the version with the fix is not yet on CTAN. While you are waiting for the ...


2

KOMA-script supports auto-sizing the width needed for the numbers in the TOC. You'll need at least three LaTeX runs to get the correct results (one to build the .toc file, one to measure the widest entry, one to get the results). The following makes the necessary changes to part to achieve this. \documentclass{scrartcl} \usepackage{polyglossia} \...


2

A workaround could be to use a matching font that contains the character: MWE \documentclass[12pt,letterpaper]{article} \usepackage{fontspec} %\usepackage{polyglossia} \newfontfamily{\sst}[Script=Devanagari]{Noto Sans Devanagari}%Sanskrit 2003} \newfontfamily{\nst}[Script=Tamil]{Noto Sans Tamil} \newfontfamily\fextra{Noto Sans} \newcommand\apostrophe{{\...


2

polyglossia doesn't break the \frenchspacing (or \nonfrenchspacing) macro as such. But a short while ago polyglossia started explicitly enabling (\frenchspacing) or disabling (\nonfrenchspacing) French spacing each time the language is switched. In your MWE the language is switched/set in or around \begin{document}, so a \frenchspacing in the preamble is ...


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