select-language.component.html

<a>{{langView}}:&nbsp;
    <button mat-icon-button matTooltip="Language">
        <mat-select #langSelect [(value)]="currLangViewValue" (selectionChange)="changeLanguage($event.value)">
            <mat-option *ngFor="let lang of languages" [value]="lang.value" [attr.selected]='de'>
            {{lang.viewValue}}
            </mat-option>
        </mat-select>
    </button>
</a>