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Qt Linguist vs Lokalize: catalog facts
Qt Linguist	Lokalize
Best for: Translators working on applications built with Qt	Best for: Translators working on KDE and other software projects
Free Free on Flathub; licensed under LGPL-3.0-only.	Free Free and open source under the GPL-2.0-or-later license.
Linux	Linux
Edits translation catalogs for Qt applications Available as a standalone desktop app	Supports software localization workflows Can translate OpenDocument files through XLIFF
Focused on Qt application translations	Windows builds are distributed through KDE’s CI package registry.
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-3.0-only	License: GPL-2.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Sources for Qt Linguist flathub.org/apps/io.qt.Linguist Catalog checked October 8, 2026	Official website Full listing and sources Sources for Lokalize userbase.kde.org/Lokalize Catalog checked October 8, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.