Can/does hyphenation ignore accents?

Question

LuaLaTeX MWE:

\documentclass[11pt]{article}

\usepackage{polyglossia}
\setotherlanguage{russian}
\usepackage{tabu}
\usepackage[textwidth=6.5in,textheight=9in,nohead,headheight=39pt,headsep=12pt,
            top=72pt]{geometry}
\usepackage{fontspec}
\setmainfont{CMU Serif}

\begin{document}

\begin{tabu}{X|X}
    Е́сли вы изу́чите ру́сский язы́к, вы полу́чите хоро́шую пабо́ту.
    & If you master (will master) Russian, you will get a good job. \\

    Е́сли вы изу́чите ру́сский язы́к, вы по\-лу́\-чите хо\-ро́\-шую пабо́ту.
    & If you master (will master) Russian, you will get a good job. \\
\end{tabu}

\end{document}

Notice that I've used U+0301, "combining acute accent," to add accents to the Russian. (Showing where the accents are is common in English texts designed for learning Russian.) Here's the Russian half (the left half of the table) from the resulting PDF:

On the first row of the table I get Underfull \hbox (badness 6332) in paragraph at lines 19--19, presumably because LuaLaTeX doesn't know how to hyphenate the words with added accents. If I explicitly hint the hyphenation, as I did on the second row, it gets hyphenated correctly.

Is there any way to tell LuaLaTeX/Polyglossia/whatever to ignore the added accents when hyphenating words?

Answer 1

I don't really know ployglossia but if I explicitly select russian the word is hyphenated:

\documentclass[11pt]{article}

\usepackage{polyglossia}
\setotherlanguage{russian}
\usepackage{tabu}
\usepackage[textwidth=6.5in,textheight=9in,nohead,headheight=39pt,headsep=12pt,
            top=72pt]{geometry}
\usepackage{fontspec}
\setmainfont{CMU Serif}


\begin{document}
%
%\input{hyph-ru}

\begin{tabu}{X|X}
    %\hyphenrules{russian}
    \leavevmode\selectlanguage{russian}\righthyphenmin=3 \lefthyphenmin=2
    Е́сли вы изу́чите ру́сский язы́к, вы полу́чите хоро́шую пабо́ту.
    & If you master (will master) Russian, you will get a good job. \\

    Е́сли вы изу́чите ру́сский язы́к, вы по\-лу́\-чите хо\-ро́\-шую пабо́ту.
    & If you master (will master) Russian, you will get a good job. \\
\end{tabu}

\end{document}

Answer 2

Based on David Carlisle's solution and egreg's comment I came up with something that seems to work on my TeX installation:

\documentclass[11pt]{article}

\usepackage[main=english,russian]{babel}
\usepackage{tabu}
\usepackage[textwidth=6.5in,textheight=9in,nohead,headheight=39pt,headsep=12pt,
            top=72pt]{geometry}
\usepackage{fontspec}
\setmainfont{CMU Serif}

\begin{document}

\begin{tabu}{>{\hyphenrules{russian}}X|X}
    Е́сли вы изу́чите ру́сский язы́к, вы полу́чите хоро́шую пабо́ту.
    & discretionary discretionary discretionary discretionary
    discretionary \\

    Е́сли вы изу́чите ру́сский язы́к, вы по\-лу́\-чите хо\-ро́\-шую пабо́ту.
    & discretionary discretionary discretionary discretionary
    discretionary \\
\end{tabu}

\end{document}

The output is now hyphenated properly:

I changed the English text to words that were likely to need hyphenation, so that I could see if I accidentally broke English hyphenation during testing.

I guess Babel now works under LuaLaTeX. I thought it did not, which is why I was using Polyglossia.

I'm new to multi-lingual LaTeX documents, so I'm a bit concerned that it looks like I have to manually tell LaTeX what kind of language each section of text is in, despite it being painfully obvious to a human. I was hoping I could simultaneously load both English and Russian hyphenation rules, and have LaTeX choose which one to use based on the surrounding characters. Manually marking each little Russian phrase as being in the Russian language is going to kind of suck.