Zalomení is a WordPress plugin that automatically applies Czech typographic rules to post content, titles, comments, and widgets. It replaces ordinary spaces with non-breaking spaces wherever Czech typography forbids a line break, so editors don’t have to type them by hand.

Although Czech is the default, the plugin is structured around editable lists of prepositions, conjunctions, and abbreviations — so it can be adapted to Slovak (and other closely related languages) simply by adjusting those lists in the settings.

Maintainer

Zalomení is actively maintained by Karolína Vyskočilová (WordPress.org username: vyskoczilova), an independent WordPress developer based in Czechia. She took the plugin over in 2026 after three years without updates, ran a full security audit, and now ships regular releases. The plugin was originally created by Honza Skýpala, whose work is gratefully acknowledged.

What the plugin handles

Prepositions — single-letter prepositions like k, s, v, z must not appear at the end of a line.
Conjunctions — single-letter conjunctions like a, i, o, u.
Abbreviations — common Czech abbreviations (e.g. např., tj., tzv.).
Numbers and units — prevents breaks between a number and its unit (e.g. 5 kg, 10 Kč).
Number formatting — keeps formatted numbers together (e.g. phone numbers like 800 123 456).
Ordinal numbers — prevents breaks after ordinals, especially in dates (e.g. 1. ledna).
Scales and ratios — keeps expressions like 1 : 50 000 on one line.
Custom terms — user-defined multi-word terms that should never be broken across lines.

All options are configurable under Settings Reading. The plugin exposes a zalomeni_filtry filter so developers can add or remove the WordPress hooks Zalomení applies to.

For more information on Czech typographic rules, see the Institute of the Czech Language.

Licence

This plugin is licensed under the GPL-2.0-or-later license. See https://www.gnu.org/licenses/gpl-2.0.html for details.