The configuration for setting rsconf.general.customTransLangs generates an array, while the expected value should be a comma separated string.
By default the product is expected to always show all standard langauges, so we recommend against setting it by default, and instead have the config disabled unless specifically enabling it. It's main use case is to disable specific unwanted translation languages, and that is not considered to be a common case.
Disable the setting by default, but when used output a comma separated string of the selected values.
Hide the config unless specifically enabled by the implementer.
Active
2.0
Code
I've created a merge request to minimally solve the issue. Ideally, the config schema should be altered to align with the ReadSpeaker config object, but this is the most pragmatic solution for now.