diff --git a/packages/ckeditor5-math/src/ui/mainformview.ts b/packages/ckeditor5-math/src/ui/mainformview.ts
index 46f6e1aaf..ac25bc5f0 100644
--- a/packages/ckeditor5-math/src/ui/mainformview.ts
+++ b/packages/ckeditor5-math/src/ui/mainformview.ts
@@ -9,16 +9,16 @@ import '../../theme/mathform.css';
 import type { KatexOptions } from '../typings-external.js';
 
 export default class MainFormView extends View {
-	public saveButtonView: ButtonView;
-	public mathLiveInputView: MathLiveInputView;
-	public rawLatexInputView: RawLatexInputView;
-	public rawLatexLabel: LabelView;
-	public displayButtonView: SwitchButtonView;
-	public cancelButtonView: ButtonView;
-	public previewEnabled: boolean;
-	public previewLabel?: LabelView;
-	public mathView?: MathView;
-	public override locale: Locale = new Locale();
+	public declare saveButtonView: ButtonView;
+	public declare mathLiveInputView: MathLiveInputView;
+	public declare rawLatexInputView: RawLatexInputView;
+	public declare rawLatexLabel: LabelView;
+	public declare displayButtonView: SwitchButtonView;
+	public declare cancelButtonView: ButtonView;
+	public declare previewEnabled: boolean;
+	public declare previewLabel?: LabelView;
+	public declare mathView?: MathView;
+	public override locale: Locale;
 
 	constructor(
 		locale: Locale,
@@ -38,6 +38,7 @@ export default class MainFormView extends View {
 		katexRenderOptions: KatexOptions
 	) {
 		super( locale );
+		this.locale = locale;
 
 		const t = locale.t;
 
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1e470a489..65308fda2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -274,9 +274,6 @@ importers:
       marked:
         specifier: 17.0.0
         version: 17.0.0
-      mathlive:
-        specifier: 0.108.2
-        version: 0.108.2
       mermaid:
         specifier: 11.12.1
         version: 11.12.1
@@ -15584,8 +15581,6 @@ snapshots:
       '@ckeditor/ckeditor5-core': 47.2.0
       '@ckeditor/ckeditor5-upload': 47.2.0
       ckeditor5: 47.2.0(patch_hash=8331a09d41443b39ea1c784daaccfeb0da4f9065ed556e7de92e9c77edd9eb41)
-    transitivePeerDependencies:
-      - supports-color
 
   '@ckeditor/ckeditor5-ai@47.2.0(bufferutil@4.0.9)(utf-8-validate@6.0.5)':
     dependencies:
@@ -16016,8 +16011,6 @@ snapshots:
       '@ckeditor/ckeditor5-table': 47.2.0
       '@ckeditor/ckeditor5-utils': 47.2.0
       ckeditor5: 47.2.0(patch_hash=8331a09d41443b39ea1c784daaccfeb0da4f9065ed556e7de92e9c77edd9eb41)
-    transitivePeerDependencies:
-      - supports-color
 
   '@ckeditor/ckeditor5-emoji@47.2.0':
     dependencies:
@@ -16502,6 +16495,8 @@ snapshots:
       '@ckeditor/ckeditor5-ui': 47.2.0
       '@ckeditor/ckeditor5-utils': 47.2.0
       ckeditor5: 47.2.0(patch_hash=8331a09d41443b39ea1c784daaccfeb0da4f9065ed556e7de92e9c77edd9eb41)
+    transitivePeerDependencies:
+      - supports-color
 
   '@ckeditor/ckeditor5-restricted-editing@47.2.0':
     dependencies: