In order to reflect reality, we work with voice actors who speak different varieties of English, such as British English, American English, or Canadian English.
In the future, we will add other varieties of English to familiarize users with the diversity of the language, such as Australian English for example!
The spelling used in the application and the activity book is the American spelling.
However, we sometimes use words specific to American English vocabulary, and others specific to British English. In the textbook, your students have access to vocabulary lists organized in columns, where it is indicated to which specific type of English the word belongs (UK, if the word is specific to British vocabulary, US, if the word is specific to American vocabulary, and USUK if the word is used in both varieties of English).