Just check against the current document lang

package.json

@@ -36,7 +36,6 @@
     "access": "public"
   },
   "dependencies": {
-    "@brightspace-ui/intl": "^3",
     "@open-wc/testing": "^3",
     "@rollup/plugin-node-resolve": "^15",
     "@web/config-loader": "^0.2",

src/browser/reset.js

@@ -1,14 +1,11 @@
 import { sendMouse, setViewport } from '@web/test-runner-commands';
-import { getDocumentLocaleSettings } from '@brightspace-ui/intl/lib/common.js';
 import { nextFrame } from '@open-wc/testing';
 
 const DEFAULT_LANG = 'en',
 	DEFAULT_MATHJAX_RENDER_LATEX = false,
 	DEFAULT_VIEWPORT_HEIGHT = 800,
 	DEFAULT_VIEWPORT_WIDTH = 800;
 
-const documentLocaleSettings = getDocumentLocaleSettings();
-
 let
 	currentMathjaxRenderLatex = DEFAULT_MATHJAX_RENDER_LATEX,
 	currentRtl = false,
@@ -60,9 +57,8 @@ export async function reset(opts = {}) {
 		currentRtl = opts.rtl;
 	}
 
-	if (opts.lang !== documentLocaleSettings.language) {
-		document.documentElement.setAttribute('lang', opts.lang);
-		documentLocaleSettings.language = opts.lang;
+	if (document.documentElement.lang !== opts.lang) {
+		document.documentElement.lang = opts.lang;
 		awaitNextFrame = true;
 	}
 

test/browser/fixture.test.js

@@ -2,14 +2,11 @@
 import { defineCE, expect, fixture, html, waitUntil } from '../../src/browser/index.js';
 import { restore, stub } from 'sinon';
 import { focusElem } from '../../src/browser/commands.js';
-import { getDocumentLocaleSettings } from '@brightspace-ui/intl/lib/common.js';
 import { LitElement } from 'lit';
 import { requestMouseReset } from '../../src/browser/reset.js';
 import { sendMouse } from '@web/test-runner-commands';
 import { unsafeHTML } from 'lit/directives/unsafe-html.js';
 
-const documentLocaleSettings = getDocumentLocaleSettings();
-
 const resolves = new Map();
 
 const slowElem = defineCE(
@@ -135,16 +132,13 @@ describe('fixture', () => {
 		it('should default language to EN', async() => {
 			await fixture(html`<p>hello</p>`);
 			expect(document.documentElement.getAttribute('lang')).to.equal('en');
-			expect(documentLocaleSettings.language).to.equal('en');
 		});
 
 		it('should reset language to EN', async() => {
 			await fixture(html`<p>bonjour</p>`, { lang: 'fr' });
 			expect(document.documentElement.getAttribute('lang')).to.equal('fr');
-			expect(documentLocaleSettings.language).to.equal('fr');
 			await fixture(html`<p>hello</p>`);
 			expect(document.documentElement.getAttribute('lang')).to.equal('en');
-			expect(documentLocaleSettings.language).to.equal('en');
 		});
 
 		it('should use specified mathjax latex config', async() => {