Other: Aligned code to changes (`config.lang` to `config.languages`). Part of the Translation Service v2 (ckeditor/ckeditor5#624).
@@ -226,7 +226,7 @@ describe( 'Heading', () => {
.create( editorElement, {
plugins: [ Heading ],
toolbar: [ 'heading' ],
- lang: 'pl',
+ language: 'pl',
heading: {
options
}