How to add custom parameters for transcribe audio in assistant?

[aef5748]

I want to add a drop-down menu to the Transcribe Audio page to specify the language in the voice file. I can already add a drop-down menu to the page(modify /src/components/fields/MediaField.vue in assistant app).

<div v-if="value !== null"
        class="media-info">
	<div>Please select audio language:
		<select v-model="selectedLanguage" @change="onLanguageChange">
			<option value="zh">Chinese</option>
			<option value="en">English</option>
		</select>
	</div>
</div>

I have also found the location of the API(in integration_openal app), but I just don’t know how to pass the parameters of the specified language. Can someone tell me how to modify it?