When you are logged into Basecone, you can click on the user-icon on the top right and then go to the 3rd tab "Settings". On the first option, you have the option to change your language settings to English and then press the blue icon to save the option. The language is changed immediately.
The language can be changed to one of the followings:
If you want to change the settings of another user, go to Settings - User - Action (edit) - tab Settings - language and select the preferred language.