So, the main Twitch design issue is that designers forgot about non-english speaking countries.
Roobert font is awesome, but don't have cyrillic subset.
So we have one font for russian menu items and another for Prime item.
Check it with a russian langauge version of main page.

Switch to IPV6, there are a lot of Streamer who have a lot of Trouble since some ISP are switching to IPV6 and DS-lite, so you have a lot of trouble with Paketloss through the IPV6->IPV4 Tunnel.
Guys its 2020 time to chance to the much better IPV6, many User would love the possibillity to enter your Server via IPV6.
you will get much batter latency, quality, and Streaming Performance.

Have it on 35 viewers instead of 75 if possible

Even if a channel is marked "mature," users can still see whats going on in the stream when browsing through Twitch. I would like a toggleable setting that allows users to hide the thumbnails or previews of streams marked as mature while browsing on Twitch for the sake of privacy and better compliance with ToS and Community Guidelines.

Yes

Hi I'm from game WoT. We have many server with different type of meta,I think it's easier for us if we follow right server Streamer to update the "right " meta.Thank you

Add Albanian lauge on twitch

Drops should occur as they are listed to occur. I.E. I just attended several days of an event with a daily attendance reward. I was given 1 out of 5, coincidentally that 1 I received should have given me 2 out of the five. Hyperlink to the event and the drop table.

https://support.ubisoft.com/en-US/faqs/52900

Make buttons that show the common games streamed so that instead of having to type in your game that you're playing constantly, you'll have a small selection of four of your most common games to pick from and a search bar if you need to look up a new game.

Since there is no Twitch app for the most popular smart TVs, maybe a "Send to device" button like YT has would allow people to watch on their smart TV without having to download a questionable 3rd party workaround.

I can finally watch OWL on my big screen, and I now watch LCS on YouTube instead of Twitch because of this very feature.

I much prefer the social aspect of Twitch, but the lack of accessibility is profound.

Here in India, we don't have twitch prime and also we don't have any twitch server even though India is one the largest marketing countries. Lack of services in india forces them to move to YouTube for live streaming. Nearest server from india in Hong Kong and you need a really really good internet to just stream. Streaming on twitch is almost impossible for Indians.

Closest server to mumbai is in France, marsielle, which has bandwidth of 3500 kbps and ping is 130ms, quality is 60.

Please do something help Indian streamers out there.

Add a follow button to the in chat user interface. We now have the ability as a streamer or viewer to add friends, whisper, gift sub, see previous messages etc. but no ability to follow directly from chat. It would save multiple clips and the additional need of opening another tab. Personally I have other streamers come into my chat and I want to follow them right then while I'm live.