Cross-lingual synthesis is not synthesizing

When I click on any AI voice bank with Synth V Studio Pro (or at least the Japanese ones), I can see sing in Japanese (default) and just Japanese. Eleanor AI has English (default) and English. Is there something I forgot to enable?

「いいね!」 1

Are these on the full versions of the voicebanks (not the Lite ver)?

Only paid AI voices have this feature, and you must be using the Pro edition of SynthV Studio.

If you are using a paid voice with the Pro editor, also ensure that all installations are up to date via the “License and Updates” panel.

「いいね!」 1