i believe subtitles are the task of the filmstudios and not of the streaming provider.
For netflix it is not.
I don't think it will be different for cryptoflix.
Sometimes even third party. Sub are widely and freely available
I feel third party providers are the best in this matter. Finding translators to different languages is not that easy, there are agencies who does this job for production companies.
I guess that fimstudios are incharge of the translations of their productions. This is an important point to expand to other countries.