Comment 1 for bug 1990284

I suspect it would be a relatively straightforward task to write an importer and exporter for this in `lib/lp/translations/utilities/` to go with the others that are already there. https://pypi.org/project/strings2pot/ only works on Python 2 so we can't use it directly, but it might at least provide ideas (its `strings2pot/extractors/arb.py` is only 134 lines of code, so pretty digestible).