Roku subtitles in non-english language

I try to show subtitle in non-english language, for example, thai and chinese, but it just display some square symbols.
I know roku didn’t support these language, but I can show these language by change the font in label node.
Is there any way to set custom font to subtitle?

Hi ,
Thanks for reaching out !

It seems like the font might not be installed on the Roku device.
The following post suggests that your app would need to download the font dynamically.

Please let us know if it resolves

Yes, but I cannot set custom font by setSubtitleStyles method, it isn’t supported on native roku video player.

Is this feature supported on bitmovin player?