import i18next from 'i18next'; import { IConfig } from '../base/config/configType'; import JITSI_TO_BCP47_MAP from './jitsi-bcp47-map.json'; import logger from './logger'; import TRANSCRIBER_LANGS from './transcriber-langs.json'; const DEFAULT_TRANSCRIBER_LANG = 'en-US'; /** * Determine which language to use for transcribing. * * @param {*} config - Application config. * @returns {string} */ export function determineTranscriptionLanguage(config: IConfig) { const { transcription } = config; // if transcriptions are not enabled nothing to determine if (!transcription?.enabled) { return undefined; } // Depending on the config either use the language that the app automatically detected or the hardcoded // config BCP47 value. // Jitsi language detections uses custom language tags, but the transcriber expects BCP-47 compliant tags, // we use a mapping file to convert them. const bcp47Locale = transcription?.useAppLanguage ?? true ? JITSI_TO_BCP47_MAP[i18next.language as keyof typeof JITSI_TO_BCP47_MAP] : transcription?.preferredLanguage; // Check if the obtained language is supported by the transcriber let safeBCP47Locale = TRANSCRIBER_LANGS[bcp47Locale as keyof typeof TRANSCRIBER_LANGS] && bcp47Locale; if (!safeBCP47Locale) { safeBCP47Locale = DEFAULT_TRANSCRIBER_LANG; logger.warn(`Transcriber language ${bcp47Locale} is not supported, using default ${DEFAULT_TRANSCRIBER_LANG}`); } logger.info(`Transcriber language set to ${safeBCP47Locale}`); return safeBCP47Locale; }