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I am writing a document in the memoir document class, using LyX.

The document main language is Hebrew (minority of the document is in English), and I use polyglossia and XeTeX to handle the languages, so that my doc preamble is

\documentclass[oneside,a4paper,10pt,twoside]{memoir} \usepackage{polyglossia} \setdefaultlanguage{hebrew} \setotherlanguage{english}

When I insert an English index entry into my document, instead of creating the tex command

\index{Dirac, Paul}

LyX creates something else.

With enter image description here I get

\index{Dirac, Paul@\textenglish[variant=american]{Dirac, Paul}}

and with enter image description here I get

\textenglish[variant=american]{\index{Dirac, Paul}}

(The blue understroke indicates foreign language)

Turns out that the more correct usage is the later, but the former is a bit more comfortable to use.

Can I change the former usage to be without this extra @ and stating the entry twice? A colleague of mine has told me that this behavior of LyX is not the same on his machine.

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  • If you don't get an answer here, I suggest you send a minimal example .lyx file to the lyx-users mailing list. Commented Jan 9, 2022 at 14:03

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After a discussion with the LyX team in the mailing list, it turns out that this is overall correct. The string before the @ is a sorting key. The second example shown in the question is the closest to the input a LaTeX user would have done.

You can bypass this behavior by inserting the following into a local layout of the document (or by creating a module file with this code and "installing" it in the layouts directory of LyX):

Format 60 InsetLayout Flex:index LyXType custom LabelString "Index" LatexType Command LatexName index Decoration classic End

Then insert an index entry with Insert -> Custom Insets, then choose index.

The tex output with this method is

\index{\textenglish[variant=american]{Dirac, Paul}}

For more information about custom insets, see the LyX customization manual.

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