Hi Fabio,
The Secure Login Client uses the User UI Language if set.
So a user can switch the langauge over the microsoft language UI in the control settings.
Of cause this will switch also all other applications to this language.
The Registry keys are only for overwriting these configuration by administrators.
Also additional the registry setting "locale" can also be set in :
[HKEY_CURRENT_USER\SOFTWARE\SAP\SecureLogin\common]Locale
be aware that a also set HCLM/Policy setting will overwrite user registry settings.
best regrads
Alexander Gimbel