<mat-form-field #langFormField appearance="fill">
    <mat-label>{{langView}}</mat-label>
        <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>
</mat-form-field>
<!--
    "lang === translate.currentLang ? '' : null"

[attr.selected]="lang === translate.currentLang ? '' : null"
-->