How to Change Operational System Language...

HP49G has the operational system
that works in 3 languages.

0 ®LANGUAGE and press [ENTER], for English
1 ®LANGUAGE and press [ENTER], for French
2 ®LANGUAGE and press [ENTER], for Spanish

English is the default language.
It is the one that appears when you turn on your HP49 by the first time
or when turn on it after reset it.

Use the command LANGUAGE® to see the number of the current language

Examples of Error Messages in 3 Languages.