diff --git a/docs/api.md b/docs/api.md
index 001c74ad..6da93a44 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -64,7 +64,7 @@ Content-Type: application/json
 | `filenameStyle`              | `string`  | `classic / pretty / basic / nerdy` | `classic` | changes the way files are named. previews can be seen in the web app.           |
 | `downloadMode`               | `string`  | `auto / audio / mute`              | `auto`    | `audio` downloads only the audio, `mute` skips the audio track in videos.       |
 | `youtubeVideoCodec`          | `string`  | `h264 / av1 / vp9`                 | `h264`    | `h264` is recommended for phones.                                               |
-| `youtubeDubLang`             | `string`  | `en / ru / cs / ja / ...`          | --        | specifies the language of audio to download, when the youtube video is dubbed   |
+| `youtubeDubLang`             | `string`  | `en / ru / cs / ja / es-US / ...`  | --        | specifies the language of audio to download when a youtube video is dubbed.     |
 | `alwaysProxy`                | `boolean` | `true / false`                     | `false`   | tunnels all downloads through the processing server, even when not necessary.   |
 | `disableMetadata`            | `boolean` | `true / false`                     | `false`   | disables file metadata when set to `true`.                                      |
 | `tiktokFullAudio`            | `boolean` | `true / false`                     | `false`   | enables download of original sound used in a tiktok video.                      |