Translating Multi-Variant Custom labels

[gap]

Hello,

Could you pls advise how to translate the custom labels of a Multi-Variant?
Other product variant labels and values can be easily overriden in the lang. ini files or even easier in the Joomla menu Extensions/Languages/Overrides.
But in case of Multivariant custom labels this isn't working, you will have the LABEL_NAME in the dropdown list.

thanks
gap