[Testing CJKV] 頭弄𠄩婀素娥, trứng vịt lộn

Inspired by the URL and title of this discussion:
https://www.steamgifts.com/discussion/Pjzx2/steam-mi-wu-zhi-xia-the-vigilant-villa-60-hl
[Steam] 迷雾之夏-The Vigilant Villa -60% (HL)

I'm testing how SG converts discussion title into URL with CJKV characters.
Why CJKV? I'm familiar with some of them.

Test cases

Notes

Chinese romanization follows pinyin system (tonal mark as number) as returned by https://www.pin1yin1.com.
Japanese romanization follows hepburn system.

Test results

Split into twos due to the 100-characters limitation in discussion title.

https://www.steamgifts.com/discussion/kkSgY/testing-cjkv-qin-shi-ming-yue-yubisakito-liananime2024-gimchi
[Testing CJKV] 秦时明月, ゆびさきと恋々「アニメ（２０２４）」, 김치

https://www.steamgifts.com/discussion/gxPM7/testing-cjkv-tou-nong-e-su-e-trung-vit-lon
[Testing CJKV] 頭弄𠄩婀素娥, trứng vịt lộn

Remarks

Chinese and Korean have correct romanization.
Japanese hiragana and katakana are correct. Kanji is treat as Chinese characters. 々 is stripped (maybe it isn't used in Chinese?). Full-width numbers become half-width.
Vietnamese Nom script is processed as Chinese script. Original Nom script characters (𠄩) are removed. These original characters aren't available in Chinese.
Vietnamese latin characters are stripped of diacritical mark.
Other characters are removed.

Spark some ideas. I wonder which software library SteamGifts is using?