Is it possible to distinguish the video streaming links by language?

Yes, the language of each stream is specifically mentioned in the fixture information. Example:

<tv_channels>
    <tv_channel name="Twitch" language="en" stream_url="https://www.twitch.tv/lpl"></tv_channel>
    <tv_channel name="Huya" language="zh" stream_url="https://liveshare.huya.com/iframe/lpl?needStop=true"></tv_channel>
</tv_channels>