Language fixed in English when download Youtube playlist

[llitkr]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2021.01.08
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

youtube-dl -v -x --audio-format mp3 https://www.youtube.com/watch?list=PLx5nmTElTMFO218LSPJ1lI265Xe8Hoyaw
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '-x', '--audio-format', 'mp3', 'https://www.youtube.com/watch?list=PLx5nmTElTMFO218LSPJ1lI265Xe8Hoyaw']
[debug] Encodings: locale cp949, fs mbcs, out cp949, pref cp949
[debug] youtube-dl version 2021.01.08
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg N-100616-gca21cb1e36, ffprobe N-100616-gca21cb1e36
[debug] Proxy map: {}
[youtube:tab] PLx5nmTElTMFO218LSPJ1lI265Xe8Hoyaw: Downloading webpage
[youtube:tab] PLx5nmTElTMFO218LSPJ1lI265Xe8Hoyaw: Downloading webpage
[download] Downloading playlist: 우타이테BUS (うたいて)
[youtube:tab] playlist 우타이테BUS (うたいて): Downloading 41 videos
[download] Downloading video 1 of 41
[youtube] No1H_3itkHA: Downloading webpage
[debug] Invoking downloader on 'https://r2---sn-n3hvcpax-bh26.googlevideo.com/videoplayback?expire=1610539490&ei=go3-X5fRHIa04wKMm5e4Ag&ip=2001%3A2d8%3Ae756%3A5bb6%3Ac11%3A8856%3A7d89%3A1069&id=o-ABlKZq8Y5bFgNLaquH1GJRx2xKXBGuUYI1LTPFskomON&itag=251&source=youtube&requiressl=yes&mh=eq&mm=31%2C29&mn=sn-n3hvcpax-bh26%2Csn-n3cgv5qc5oq-bh267&ms=au%2Crdu&mv=m&mvi=2&pl=44&initcwndbps=820000&vprv=1&mime=audio%2Fwebm&ns=5_Rx7O29X3vBhI0TIUgk2gsF&gir=yes&clen=3857235&dur=228.201&lmt=1610014895577435&mt=1610517390&fvip=2&keepalive=yes&c=WEB&txp=5411222&n=rMs8U72uGKumpw&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&sig=AOq0QJ8wRQIhAI6Ol266KQkBUZWvywiXiwoxJ5zDxYk3PIHsrPBFCCVsAiATLtTpt0fnkxHJxC2oogkCVQjDrSBW_YC810hXDdXCWg%3D%3D&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRAIgYzgd3bl-V-KtuudBOdSu6mV0v4E6Zs2AEItINoBCTxUCIHa1H_z0pp31e2BKkK0uiwqy75BRF_DiGuEqLmhJL29t&ratebypass=yes'
[download] Destination: Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.webm
[download] 100% of 3.68MiB in 00:00
[debug] ffmpeg command line: ffprobe -show_streams "file:Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.webm"
[ffmpeg] Destination: Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.mp3
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.webm" -vn -acodec libmp3lame "-q:a" 5 "file:Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.mp3"
Deleting original file Love is hard for Otaku - Fiction (Japanese Full ver. Cover) Wotaku ni Koi wa Muzukashii OP-No1H_3itkHA.webm (pass -k to keep)
[download] Downloading video 2 of 41
[youtube] HoXb-kdPHaw: Downloading webpage
[youtube] {18} signature length 108, html5 player 9f996d3e
[youtube] {137} signature length 104, html5 player 9f996d3e
[youtube] {248} signature length 108, html5 player 9f996d3e
[youtube] {136} signature length 108, html5 player 9f996d3e
[youtube] {247} signature length 108, html5 player 9f996d3e
[youtube] {135} signature length 108, html5 player 9f996d3e
[youtube] {244} signature length 108, html5 player 9f996d3e
[youtube] {134} signature length 108, html5 player 9f996d3e
[youtube] {243} signature length 108, html5 player 9f996d3e
[youtube] {133} signature length 104, html5 player 9f996d3e
[youtube] {242} signature length 104, html5 player 9f996d3e
[youtube] {160} signature length 104, html5 player 9f996d3e
[youtube] {278} signature length 108, html5 player 9f996d3e
[youtube] {140} signature length 104, html5 player 9f996d3e
[youtube] {249} signature length 108, html5 player 9f996d3e
[youtube] {250} signature length 108, html5 player 9f996d3e
[youtube] {251} signature length 108, html5 player 9f996d3e
[debug] Invoking downloader on 'https://r3---sn-n3hvcpax-bh2k.googlevideo.com/videoplayback?expire=1610539495&ei=h43-X-6QIrqllQTtma_4BA&ip=2001%3A2d8%3Ae756%3A5bb6%3Ac11%3A8856%3A7d89%3A1069&id=o-APLIAc3yhDXg27o21k8oxIczmK1BTtzS0G3s2DCcQNg0&itag=251&source=youtube&requiressl=yes&mh=LN&mm=31%2C29&mn=sn-n3hvcpax-bh2k%2Csn-n3cgv5qc5oq-bh2lk&ms=au%2Crdu&mv=m&mvi=3&pl=44&initcwndbps=637500&vprv=1&mime=audio%2Fwebm&ns=EVBZr-y5--9gjKvYnWOPv6kF&gir=yes&clen=4920032&dur=281.181&lmt=1609147597966695&mt=1610517390&fvip=8&keepalive=yes&c=WEB&txp=5432434&n=8FDkzoCb33ye7w&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAIk9rqyvhpCbianVRxmXGY1bW2k-ybU6ddbzrNpy_0tFAiEA0NASa8rLxMeOQfgMlD9faJty2sHzx4pAmji6_tTB_6w%3D&sig=AOq0QJ8wRQIgQxbl34VsW1nVIEh7lBCAwk0yZVLcbW3StYmiBkbUiVACIQDdMI9vH1ZhgDct0sA4l9W2IMra6tlM10yDpsqK8XipOA==&ratebypass=yes'
[download] Destination: Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.webm
[download] 100% of 4.69MiB in 00:00
[debug] ffmpeg command line: ffprobe -show_streams "file:Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.webm"
[ffmpeg] Destination: Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.mp3
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.webm" -vn -acodec libmp3lame "-q:a" 5 "file:Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.mp3"
Deleting original file Glutamine - Hoshiai (Japanese Full ver. Cover)-HoXb-kdPHaw.webm (pass -k to keep)
[download] Downloading video 3 of 41
[youtube] 4PPylEhLQqI: Downloading webpage
[youtube] {18} signature length 108, html5 player 9f996d3e
[youtube] {137} signature length 108, html5 player 9f996d3e
[youtube] {248} signature length 108, html5 player 9f996d3e
[youtube] {136} signature length 108, html5 player 9f996d3e
[youtube] {247} signature length 108, html5 player 9f996d3e
[youtube] {135} signature length 108, html5 player 9f996d3e
[youtube] {244} signature length 108, html5 player 9f996d3e
[youtube] {134} signature length 108, html5 player 9f996d3e
[youtube] {243} signature length 108, html5 player 9f996d3e
[youtube] {133} signature length 108, html5 player 9f996d3e
[youtube] {242} signature length 108, html5 player 9f996d3e
[youtube] {160} signature length 104, html5 player 9f996d3e
[youtube] {278} signature length 108, html5 player 9f996d3e
[youtube] {140} signature length 108, html5 player 9f996d3e
[youtube] {249} signature length 108, html5 player 9f996d3e
[youtube] {250} signature length 108, html5 player 9f996d3e
[youtube] {251} signature length 104, html5 player 9f996d3e
[debug] Invoking downloader on 'https://r5---sn-n3hvcpax-bh2es.googlevideo.com/videoplayback?expire=1610539501&ei=jY3-X-e3F_CE1d8PkZa0kAU&ip=2001%3A2d8%3Ae756%3A5bb6%3Ac11%3A8856%3A7d89%3A1069&id=o-AFNR8eWmOoynYv6vQVcScv5qUaLsHIEBP7f7BJ_NLZBI&itag=251&source=youtube&requiressl=yes&mh=rm&mm=31%2C29&mn=sn-n3hvcpax-bh2es%2Csn-n3cgv5qc5oq-bh2sr&ms=au%2Crdu&mv=m&mvi=5&pl=44&initcwndbps=755000&vprv=1&mime=audio%2Fwebm&ns=01b3Np_KnaWMTeqMW4J84G0F&gir=yes&clen=4143547&dur=244.021&lmt=1608540765226895&mt=1610517633&fvip=5&keepalive=yes&c=WEB&txp=6311222&n=Ujmr4TwtPjNEmv&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRQIgNhtvAbFjU_OQcGEvtFPe3ZiDiuWDvAcMmiGcjwn-8okCIQCyj7LEhq4i9fKuzYiU611JoP5tlGVvtb0_ZTLto8JxNQ%3D%3D&sig=AOq0QJ8wRAIgBCZarjthcYn7RoFO9pGOwLxysX0HNIX9qOIh-a1phCgCIBkrxQv4YQQczHzf8m58hUgfivSBwhYIDm-SJ2ad38fk&ratebypass=yes'
[download] Destination: Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.webm
[download] 100% of 3.95MiB in 00:00
[debug] ffmpeg command line: ffprobe -show_streams "file:Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.webm"
[ffmpeg] Destination: Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.mp3
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.webm" -vn -acodec libmp3lame "-q:a" 5 "file:Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.mp3"
Deleting original file Major 1 OP - Kokoro E (Japanese Full ver. Cover) Road Of Major-4PPylEhLQqI.webm (pass -k to keep)
[download] Downloading video 4 of 41
[youtube] lmjKE33kpGA: Downloading webpage
[youtube] {18} signature length 108, html5 player 9f996d3e
[youtube] {137} signature length 108, html5 player 9f996d3e
[youtube] {248} signature length 104, html5 player 9f996d3e
[youtube] {136} signature length 104, html5 player 9f996d3e
[youtube] {247} signature length 104, html5 player 9f996d3e
[youtube] {135} signature length 104, html5 player 9f996d3e
[youtube] {244} signature length 108, html5 player 9f996d3e
[youtube] {134} signature length 104, html5 player 9f996d3e
[youtube] {243} signature length 108, html5 player 9f996d3e
[youtube] {133} signature length 108, html5 player 9f996d3e
[youtube] {242} signature length 108, html5 player 9f996d3e
[youtube] {160} signature length 108, html5 player 9f996d3e
[youtube] {278} signature length 108, html5 player 9f996d3e
[youtube] {140} signature length 108, html5 player 9f996d3e
[youtube] {249} signature length 104, html5 player 9f996d3e
[youtube] {250} signature length 104, html5 player 9f996d3e
[youtube] {251} signature length 108, html5 player 9f996d3e
[debug] Invoking downloader on 'https://r3---sn-n3hvcpax-bh2r.googlevideo.com/videoplayback?expire=1610539506&ei=ko3-X4CoM4ni4wKt37XwCg&ip=2001%3A2d8%3Ae756%3A5bb6%3Ac11%3A8856%3A7d89%3A1069&id=o-AEnSnRdykv-hqQNssD73scnAAKfmOw2Bxp8PZBgafqlp&itag=251&source=youtube&requiressl=yes&mh=oI&mm=31%2C29&mn=sn-n3hvcpax-bh2r%2Csn-n3cgv5qc5oq-bh2ss&ms=au%2Crdu&mv=m&mvi=3&pl=44&initcwndbps=630000&vprv=1&mime=audio%2Fwebm&ns=H2UVVk2YqK9O3pBFlQwkn3kF&gir=yes&clen=4300143&dur=250.201&lmt=1608204683406899&mt=1610517633&fvip=3&keepalive=yes&c=WEB&txp=5411222&n=EgYCc1V9vkGqPn&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhAJmCE1boQkfzSC8jz8V6IwuSrLPABk2owW_yi2XxLcoRAiEA9ALJzkVReB4IcLsAMOz-1U-ZY2skqmCNMRF95f76YWU%3D&sig=AOq0QJ8wRQIhAIdXs9WkvsAMiHI-uyL165xVhHpbrzefBO3xnd9W2_e9AiBL2cZ5qLqAbOcS0amU02wOB8MHLK-EkhaVmbTJB6L8LQ==&ratebypass=yes'
[download] Destination: Kenshi Yonezu - Lemon (Full ver. Cover)-lmjKE33kpGA.webm
[download] 100% of 4.10MiB in 00:01
[debug] ffmpeg command line: ffprobe -show_streams "file:Kenshi Yonezu - Lemon (Full ver. Cover)-lmjKE33kpGA.webm"
[ffmpeg] Destination: Kenshi Yonezu - Lemon (Full ver. Cover)-lmjKE33kpGA.mp3
[debug] ffmpeg command line: ffmpeg -y -loglevel "repeat+info" -i "file:Kenshi Yonezu - Lemon (Full ver. Cover)-lmjKE33kpGA.webm" -vn -acodec libmp3lame "-q:a" 5 "file:Kenshi Yonezu - Lemon (Full ver. Cover)-lmjKE33kpGA.mp3"

Description

When I download single Youtube video, Youtube-dl works well with original content's language.

However, when I try to download whole playlist from Youtube with Youtube-dl, it downloads all of videos with English language even if it's original language is Korean.

I don't want to force language to some specific one but just want to download the video with original title.

[hinikuya]

I'm having the same problem with version 2021.01.24.1. Furthermore, it affects channel archives as well as playlists.

Short examples I have:

youtube-dl https://www.youtube.com/watch?v=uAN0RhnPz_o -o "%(title)s.%(ext)s"
youtube-dl https://www.youtube.com/watch?v=hgwP6h7uefw -o "%(title)s.%(ext)s"

Both of these will download in the original language.

youtube-dl https://youtube.com/playlist?list=PLc8pE8S7aih1kjJclxzqxA4CkvTPH2hY1  -o "%(title)s.%(ext)s"

This playlist contains the same two videos, but one will download with an English title and the other in the original Japanese.

youtube-dl https://www.youtube.com/channel/UCB1s_IdO-r0nUkY2mXeti-A --ignore-errors -o "%(title)s.%(ext)s"

This is the original channel with the above videos (along with a bunch of others, so it might take a while as a test), but some of the videos will be in English, while others in the original Japanese.