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This page explains how to install, configure, and use the DeepL Localization Provider for Unreal Engine’s Localization Dashboard. It also covers best practices, troubleshooting, and privacy.

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What this plugin does

• Adds a “DeepL” provider to the Localization Dashboard (Editor-only).
• Translates missing strings and (optionally) stale strings (where source changed) via DeepL /v2/translate.
• Supports DeepL context, formality, and glossary.
• Shows a progress notification during long imports.
• Provides a local translation cache to reduce API calls.
• One-click API usage & quota test.

This plugin is not made by, affiliated with, or endorsed by DeepL. It simply calls the DeepL API you configure.

Requirements

• Unreal Engine (Localization Dashboard enabled).
• A DeepL API key (Free or Pro).
• Internet access from the machine running the Editor.

The plugin is Editor-only. It does not add runtime dependencies to your packaged builds.

Installation

1. Install the plugin into your project (Plugins folder) or engine (Engine/Plugins).
2. Restart the Editor and enable DeepL Localization if prompted.
3. Go to Editor Preferences → DeepL Localization to configure it