Description:
For readability and tradition, orthography and typography prefer or only allow hyphenation between stems in compound words in several languages, like Danish, Dutch, German, Hungarian, Norwegian and Sweden.

Hyphenation zone is to avoid of too much or bad hyphenation. Preferring stem boundaries for hyphenation within the hyphenation zone is a natural extension of  it, i.e. skip hyphenation within stems, if there is stem boundary within the hyphenation zone.

More information: “The hyphenation problems in Swedish have to do with the high frequency of compound words (the Swedish vocabulary can’t be enumerated: new compounds are easily created by anyone) and the rule that a compound word shall always be hyphenated between the constituent word parts, to ease the flow of reading.”  quoted in Notes on Compound Word Hyphenation in TEX by Petr Sojka, TUGboat, Volume 16 (1995), No. 3 — Proceedings of the 1995 Annual Meeting (https://tug.org/TUGboat/tb16-3/tb48soj2.pdf).

Steps to Reproduce:
1. open the attached test file after installing the Hungarian hyphenation patterns

Actual Results:
hyphenation of “főbejárat” (main entrance) as “főbe-járat” (resulting words with different meaning: “főbe” = “into head”, “járat” = “route/flight”).

Expected Results:
fő-bejárat (“main” and “entrance”)


Reproducible: Always


User Profile Reset: No

Additional Info:
Note: libhyphen contains some compound word support and hard-wired arguments for limiting hyphenation near the stem boundaries, but only German hyphenation patterns started to use that, and the solution doesn't work for compounds containing custom words (see Grammar By feature of the custom dictionary of LibreOffice).