Depending on the game, you will be able to change the language via an in-game options menu or via the GOG Galaxy client.
Our games are sold in a number of regions around the world. Different regions offer different language configurations and not all languages may be available for you to choose from.
Please be aware of keystores offering discounts for game keys which only contain a limited selection of languages.
We only sell our game through Steam, GOG and selected digital and retail partners. It's very likely that the version being offered by the keystore is a version which has been restricted to specific languages. As a result this version will only contain text and audio files specific to those languages. If you purchased a game key from a keystore and it is missing languages that were listed on the keystore product page, please contact the keystore directly.