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Fix: Detect browser language and use for Translate plugin 'To' language #1461

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Fix: Detect browser language and use for Translate plugin 'To' language #1461

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13 changes: 12 additions & 1 deletion src/plugins/translate/plugin.translate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -107,7 +107,18 @@ export class TranslatePlugin extends BookReaderPlugin {
await this.translationManager.initWorker();
// Note await above lets _render function properly, since it gives the browser
// time to render the rest of bookreader, which _render depends on
this.langToCode = this.translationManager.toLanguages[0].code;

// Detect browser language and use as default "To" language if available
const browserLang = navigator.language;
const browserLangCode = toISO6391(browserLang);
const browserLangAvailable = browserLangCode &&
this.translationManager.toLanguages.some(lang => lang.code === browserLangCode);

// Set browser language as default if available, otherwise fallback to English
this.langToCode = browserLangAvailable
? browserLangCode
: this.translationManager.toLanguages[0].code;

this._render();
}

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