Queen Insoo Episode 20

ref. In this ep, it is mentioned that JoongJun(=queen consort) is in charge of NaeMyungBu and WaeMyungBu. What are they?
1) NaeMyungBu: Ranks of women in the palace.
Jung 1Pum: Bin (HeeBin, GyungBin, ChangBin, HyeBin) ; Jong 1Pum: GuiIn; Jung 2Pum: SoUi; Jong 2Pum: SukUi; Jung 3Pum: SoYong; Jong 3Pum: SukYong; Jung 4Pum: SoWan; Jong 4Pum: SukWan (here and above are concubines.)

Jung 5Pum: SangGung, SangUi(take care of manners) ; Jong 5Pum: SangBok (clothes), SangSik (food); Jung 6Pum: SangChim (king's general livelihood), SangGong, SangJung(inspection of GungNye's duty); Jong 6Pum: SangGi(Palace accounting); Jung 7Pum: JunBin (Serving guests), JunUi(outfits and headpiece), JunSun (making side dishes); Jong 7Pum: JunSul(cleaning), JunJe(tailoring), JunUn(making announcement) ;Jung 8Pum: Junsik(makeup, washing), JunYak(making tonic); Jong 8Pum: JunDeong(lights), JunChae(silk etc materials), JunJung(assisting patrol of palace)

2) WaeMyungBu: The ranks of women outside of palace, wives of court officials and royalty.
a. wives of royalty
Jung 1Pum: Bubuin(=queen's mother, Deagun's wife); Jong 1Pum: Gunbuin (=wife of prince/gun); Jung/Jong 2Pum: HyunBuin; Jung/Jong 3Pum: SinBuin, SinIn; Jung/Jong 4Pum: HyeIn; Jung/Jong 5Pum: OnIn; Jung 6Pum: SunIn.

b. wives of civil and military officials.
Jung/Jong 1Pum: JungGyung Buin; Jung/Jong 2Pum: Jung Buin; Jung/Jong 3Pum: Suk Buin, SukIn; Jung/Jong 4Pum: YoungIn; Jung/Jong 5Pum: GongIn; Jung/Jong 6Pum: UiIn; Jung/Jong 7Pum: AnIn
Jung/Jong 8Pum: DanIn; Jung/Jong 9Pum: YooIn

A little side story: 'JunHa' is king, and 'JuHa' is crown prince. Just once, there was almost an exception. YoungJo (remember DongYi's son?)'s queen consort loved JungJo's (YoungJo's grandson YiSan)'s concubine (remember YiSan's love interest?), so she wanted to have people call her 'JuHa', but JungJo turned that down out of courtesy for his queen consort.

HanHwak mentions Prince's rebellion in this ep. What is it?
TaeJo (YiSeungGye) had the wife Han Ssi who he married when he was a no-name general in GoRyeo Dynasty. They had 6 Sons-BangWoo, BangGwa, BangUi, BangGan, BangWon, and BangYeon.
Later, he married to new wife Gang Ssi who gave him great assistance to build the new nation JoSeon. They had 2 sons- BangBun, BangSuk.

After establishing the new nation JoSeon, TaeJo appointed Gang Ssi as Queen consort. And only 1 year later, he appointed Han Ssi as second wife. He chose BangSuk (youngest son, son of Han Ssi) as SeJa. In the end, Han Ssi became like concubine, and her sons were upset, and raised the coup on 7th year of TaeJo's reign. This is the FIRST prince's rebellion. That time, BangSuk and BangBun (=sons of Gang ssi) were murdered. After that, the Second Son of Han Ssi, BangGwa was selected as SeJa and became the king JungJong/2nd king of JoSeon.

Other princes became upset about BangWon, the 5th son who was threatening JungJong who was weak. BangGan (4th son) raised a rebellion, fighting against BangWon (5th son) on 2nd year of JungJong's reign. This is the SECOND prince's rebellion. BangWon defeated BangGan, and was chosen as SeJa next month. JungJong handed his throne over to him 9 months later. And this person/BangWon is TaeJong (SeJong the great's father).

Rough translation is available for this ep if anyone is interested in.

I have followed Episodes 1 - 18 with English Subtitle. But now I find from Episode 19 onwards there is no English subtitle. So how can I understand the story since I am English educated only. Can you please let me know how am I going to watch the drama with English subtitle.