[<reference> choose language]-> [<input> Choose language]
[Choose language]-> [<choice> 1. English]
[1. English]-> yes [change language to English]
[change language to English]-> [<reference> complete]
[1. English]-> no [<choice> 2. Kiswahili]
[2. Kiswahili]-> yes [change language to Swahili]
[change language to Swahili]-> [<label> complete]
[2. Kiswahili]-> no [<reference> exit invalid menu option]
