The reason French is treated specially is that I completed the
translation up to 100% coverage in Qt Linguist as a test case for the
new translation infrastructure, and have no desire to convert this
translation work to the legacy FlightGear-specific XML format. But of
course, this complete translation is in XLIFF 1.2 format (since it is
saved by Qt Linguist) and thus can't be used by FlightGear yet.
On the other hand, for the other languages, no translator ever modified
the XLIFF files, therefore the best way to proceed for is that people
continue to work with the legacy FlightGear-specific XML format until
the new translation infrastructure is ready (this way, their work is
visible in FlightGear). The Python-based tools in FGMeta allow one to
automatically convert from this legacy format to the XLIFF 1.2 format,
as explained in fgmeta/python3-flightgear/README-l10n.txt. Which is
precisely what this commit does.
These files have been generated from the existing XML files (cf.
fg-convert-translation-files in fgmeta).
Translations/en_US/FlightGear-nonQt.xlf is for a proper English
translation, where for instance "found %n airport(s)" would have two
plural forms, "found %n airport" and "found %n airports" (most
non-plural strings can be taken verbatim from the default translation,
and at this point there is no plural form at all yet).
This translated string has been removed from Translations/en/menu.xml in
commit ff87cf4257. Remove its translations
from the other Translations/*/menu.xml files that still have it.
Also remove <intl include="Translations/locale.xml"/> from
preferences.xml. Something equivalent based on readProperties() is done
in FlightGear (cf. FGLocale::FGLocale() in
flightgear/src/Main/locale.cxx).
Run script to identify missing/obsolete items:
de/options.xml is missing 192 translation(s).
de/menu.xml is missing 20 translation(s).
es/options.xml is missing 12 translation(s).
es/menu.xml is missing 78 translation(s).
fr/options.xml is missing 0 translation(s).
fr/menu.xml is missing 0 translation(s).
it/options.xml is missing 212 translation(s).
it/menu.xml is missing 78 translation(s).
nl/options.xml is missing 54 translation(s).
nl/menu.xml is missing 1 translation(s).
pl/options.xml is missing 81 translation(s).
pl/menu.xml is missing 76 translation(s).
pt/options.xml is missing 212 translation(s).
pt/menu.xml is missing 86 translation(s).
