How do we set up Sinolta using a different language than English?

Enter all visible fields such as HMI captions, Tag descriptions, units, alarm messages, etc. in the desired language.
From the database builder, open the Project Object wizard and set both Primary and Auxiliary languages to the desired language.
During runtime, open the Real-time viewer, and select Options from the Tools pulldown menu to select your language. Each user needs to do this step only once and the setting will be remembered.