Include an easy of maintenance way to configure the language in the descriptions and titles of plots.
According to the default language of a user or group, use a configuration file of legends (locale file) to show titles, etc. in the correspondent language.
It is like this but using a configuration file to be easier to operate in a big/complex dashboard: https://community.tibco.com/questions/how-can-i-change-my-title-and-axis-names-when-i-change-my-language-using-drop-down-list