In order to view your interface in a different language which is available, all you need to do is go to the bottom of the page and click on the desired available language:

French: https://www.twenga-solutions.com/fr/

English: https://www.twenga-solutions.com/en/

Spanish: https://www.twenga-solutions.com/es/

German: https://www.twenga-solutions.com/de/

Italian: https://www.twenga-solutions.com/it/

Dutch: https://www.twenga-solutions.com/nl/

Polish: https://www.twenga-solutions.com/pl/