These are Ryukyuan languages spoken in Okinawa. They use an orthography similar to Japanese, and like Japanese, we need to store both strings including kanji and strings which are only kana.

ryu-hira (Okinawan (Hiragana script)) (ryu is already available)

• Wikidata item: https://www.wikidata.org/wiki/Q34233
• Existing lexemes: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q34233?namespace=146
• BCP 47: https://r12a.github.io/app-subtags/index?check=ryu-hira

mvi (Miyako) and mvi-hira (Miyako (Hiragana script))

• Wikidata item: https://www.wikidata.org/wiki/Q36218
• Existing lexemes: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q36218?namespace=146
• ISO 639-3: https://iso639-3.sil.org/code/mvi
• BCP 47: https://r12a.github.io/app-subtags/index?check=mvi, https://r12a.github.io/app-subtags/index?check=mvi-hira

yoi (Yonaguni) and yoi-hira (Yonaguni (Hiragana script))

• Wikidata item: https://www.wikidata.org/wiki/Q34243
• Existing lexemes: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q34243?namespace=146
• ISO 639-3: https://iso639-3.sil.org/code/yoi
• BCP 47: https://r12a.github.io/app-subtags/index?check=yoi, https://r12a.github.io/app-subtags/index?check=yoi-hira

rys (Yaeyama) and rys-hira (Yaeyama (Hiragana script))

• Wikidata item: https://www.wikidata.org/wiki/Q34203
• Existing lexemes: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q34203?namespace=146
• ISO 639-3: https://iso639-3.sil.org/code/rys
• BCP 47: https://r12a.github.io/app-subtags/index?check=rys, https://r12a.github.io/app-subtags/index?check=rys-hira

yox (Yoron) and yox-hira (Yoron (Hiragana script))

• Wikidata item: https://www.wikidata.org/wiki/Q2424943
• Existing lexemes: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q2424943?namespace=146
• ISO 639-3: https://iso639-3.sil.org/code/yox
• BCP 47: https://r12a.github.io/app-subtags/index?check=yox, https://r12a.github.io/app-subtags/index?check=yox-hira