Thank you for your kind reply.
I have already searched the app store (iTunes) for Maltese but there are not any apps.
Ideally the Maltese language should be added in the list of default languages of iPad or else the app should be integrated into the main keyboard of iPad (and iPhone) so as to avoid having to write Maltese in an application and then copy it each time to the email/sms you want to send. This can be done by long pressing the keys, for instance.
Is there an online forum or a particular app developers' website dedicated to resources to read and write languages other than English on iOS devices?