This specific build typically supports multiple languages (MULTi13), including English, French, German, Spanish, Russian, and Chinese.
Settings can often be manually adjusted in the config.lsx or settings.json files found in the Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition directory.
If you are looking to modify the text or language settings for this specific GOG build:
The version of Divinity: Original Sin 2 – Definitive Edition is a specific build often associated with the GOG.com (Good Old Games) DRM-free release. This build includes the base game along with all Definitive Edition enhancements, such as reworked narrative arcs, improved performance, and integrated DLCs like the Sir Lora companion. Key Version Features
This version is compatible with most Nexus Mods that don't rely on the Steam Workshop, though you may need the Norbyte's Script Extender for more complex gameplay modifications.
GOG editions often bundle additional digital goods such as the soundtrack, artbooks, and maps. Managing Language and Settings