diff --git a/resources/languages.ts b/resources/languages.ts
index 06116f4e780..8c30546e8a6 100644
--- a/resources/languages.ts
+++ b/resources/languages.ts
@@ -89,8 +89,7 @@ export const langToLocale = (lang: Lang): string => {
   }[lang];
 };
 
-export const browserLanguagesToLang = (languagesArr: readonly string[]): Lang => {
-  // languagesArr receives only `navigator.languages` as input
+export const localesToLang = (locales: readonly string[]): Lang => {
   const mapLanguage = (lang: string): string => {
     // Handle Chinese variants
     if (lang.startsWith('zh-')) {
@@ -107,8 +106,10 @@ export const browserLanguagesToLang = (languagesArr: readonly string[]): Lang =>
     }
     return lang.slice(0, 2);
   };
-  const lang = [...languagesArr, 'en']
+  const lang = [...locales, 'en']
     .map(mapLanguage)
     .filter((l) => languages.includes(l as Lang))[0];
   return isLang(lang) ? lang : 'en';
 };
+
+export const browserLanguagesToLang = (): Lang => localesToLang(navigator.languages);
diff --git a/ui/raidboss/raidemulator.ts b/ui/raidboss/raidemulator.ts
index 5eb4165b6be..1c204d636a4 100644
--- a/ui/raidboss/raidemulator.ts
+++ b/ui/raidboss/raidemulator.ts
@@ -151,7 +151,7 @@ const raidEmulatorOnLoad = async () => {
 
   if (!websocketConnected) {
     // Find the most appropriate lang code to use based on browser language priority
-    const browserLang = browserLanguagesToLang(navigator.languages);
+    const browserLang = browserLanguagesToLang();
     applyTranslation(browserLang);
 
     options.ParserLanguage = browserLang;
diff --git a/util/coverage/coverage.ts b/util/coverage/coverage.ts
index ae2bed5d23c..86959954596 100644
--- a/util/coverage/coverage.ts
+++ b/util/coverage/coverage.ts
@@ -1,6 +1,13 @@
 import contentList from '../../resources/content_list';
 import ContentType from '../../resources/content_type';
-import { isLang, Lang, langMap, langToLocale, languages } from '../../resources/languages';
+import {
+  browserLanguagesToLang,
+  isLang,
+  Lang,
+  langMap,
+  langToLocale,
+  languages,
+} from '../../resources/languages';
 import { UnreachableCode } from '../../resources/not_reached';
 import ZoneInfo from '../../resources/zone_info';
 import { LocaleObject, LocaleText } from '../../types/trigger';
@@ -512,7 +519,7 @@ const miscStrings = {
     fr: 'Erreur : Lancez npm run coverage-report pour générer des données.',
     ja: 'エラー：npm run coverage-report を実行し、データを生成しよう。',
     cn: '错误：请先运行 npm run coverage-report 以生成数据。',
-    ko: '에러: 데이터를 생성하려면 node npm run coverage-report를 실행하세요.',
+    ko: '에러: 데이터를 생성하려면 npm run coverage-report를 실행하세요.',
     tc: '錯誤：請先運行 npm run coverage-report 來產生資料。',
   },
   // Indicator that content is unsupported
@@ -1356,7 +1363,7 @@ const buildLanguageSelect = (container: HTMLElement, lang: Lang) => {
 document.addEventListener('DOMContentLoaded', () => {
   // Allow for `coverage.html?lang=de` style constructions.
   const params = new URLSearchParams(window.location.search);
-  const langStr = params.get('lang') ?? 'en';
+  const langStr = params.get('lang') ?? browserLanguagesToLang();
   // TODO: left for now as backwards compatibility with user css.  Remove this later??
   document.body.classList.add(`lang-${langStr}`);
   const lang = langStr !== null && isLang(langStr) ? langStr : 'en';
diff --git a/util/logtools/web_splitter.ts b/util/logtools/web_splitter.ts
index 578b98598b9..622df5f8a5b 100644
--- a/util/logtools/web_splitter.ts
+++ b/util/logtools/web_splitter.ts
@@ -349,7 +349,7 @@ const downloadFile = (output: string[], filename: string): void => {
 };
 
 const onLoaded = () => {
-  const lang = browserLanguagesToLang(navigator.languages);
+  const lang = browserLanguagesToLang();
 
   const table = getElement('fight-table');
   const fileDrop = getElement('filedrop');