chore(i18n,docs): update translations (#43567)

docs/i18n/chinese/how-to-test-translations-locally.md

@@ -126,6 +126,60 @@ CLIENT_LOCALE="dothraki"
 CURRICULUM_LOCALE="dothraki"
 ```
 
+## Enabling Localized Videos
+
+For the video challenges, you need to change a few things. First add the new locale to the GraphQL query in the `client/src/templates/Challenges/video/Show.tsx` file. For example, adding Dothraki to the query:
+
+```tsx
+  query VideoChallenge($slug: String!) {
+    challengeNode(fields: { slug: { eq: $slug } }) {
+      videoId
+      videoLocaleIds {
+        espanol
+        italian
+        portuguese
+        dothraki
+      }
+      ...
+```
+
+Then add an id for the new language to any video challenge in an audited block. For example, if `auditedCerts` in `all-langs.js` includes `scientific-computing-with-python` for `dothraki`, then you must add a `dothraki` entry in `videoLocaleIds`.  The frontmatter should then look like this:
+
+```yml
+videoLocaleIds:
+  espanol: 3muQV-Im3Z0
+  italian: hiRTRAqNlpE
+  portuguese: AelGAcoMXbI
+  dothraki: new-id-here
+dashedName: introduction-why-program
+---
+```
+
+Update the `VideoLocaleIds` interface in `client/src/redux/prop-types` to include the new language.
+
+```ts
+export interface VideoLocaleIds {
+  espanol?: string;
+  italian?: string;
+  portuguese?: string;
+  dothraki?: string;
+}
+```
+
+And finally update the challenge schema in `curriculum/schema/challengeSchema.js`.
+
+```js
+videoLocaleIds: Joi.when('challengeType', {
+  is: challengeTypes.video,
+  then: Joi.object().keys({
+    espanol: Joi.string(),
+    italian: Joi.string(),
+    portuguese: Joi.string(),
+    dothraki: Joi.string()
+  })
+}),
+```
+
 ## Loading Translations
 
 Because the language has not been approved for production, our scripts are not automatically downloading the translations yet. Only staff have the access to directly download the translations - you are welcome to reach out to us in our [contributors chat room](https://chat.freecodecamp.org/channel/contributors), or you can translate the English markdown files locally for testing purposes.