Am 21.10.2016 um 01:58 schrieb Uwe Stöhr:
There are in fact 4 such languages that are not RTL/BiDi. Attached is therefore a better patch with support for these.
OK, it is now in. Since all languages are non-RTL, they behave like all other languages supported in polyglossia but not babel.
The Python masters perhaps know a cleaner solution for the lyx2lyx reversion code. However the reversion works and assures that the output would have the correct language.
regards Uwe