Missing strings in Group Registration process

These two strings (for Group Registrations) don’t seem to appear in the Translation interface.

Please enter information in the form below to complete group registration for event [EVENT].
Please enter number of members for your group registration. Number of members need to be greater than or equal [group registration max]. You can enter detail information of these members in the next step.

That's long message, support HTML, so it could not be stored in language file

You can access to Events Booking, then Setup -> Email & Messages, find the message and change it to meet your need

Regards,

Tuan