We currently assume the language and language-string-type always exists. Is this ok?

[dave-mills]

If someone uploads a form with the following header:

label::Some Made Up Language (ss)

The form import will fail because that language does not exist in the database. While it is recommended practice to use generally acceptedd language names and iso_alpha2 codes for Xlsform column headers, the above column will compile in ODK and give you the "Some Made Up Language" option in the language switcher in ODK Collect.

So... we probably need to account for this in the generalised system. I'm marking this as 'won't fix' for HOLPA, but leaving it here for when we move to the broader generalised tool.