Locale ignored in grid datepicker.

Greetings.

I need to localize the datepickers in my grid to ru-RU culture. I use the editParams property on datepicker holding columns to do that. However, there is no result. Here's the grid:

<ej-grid id="Grid" [dataSource]="dataManager" [allowSorting]="true" [allowFiltering]="true"
    [allowSelection]="true" [selectionType]="single" [allowScrolling]="true"[selectionSettings]="{selectionType:[cell]}" 
    [editSettings]="{'allowEditing':'true', 'editMode':'batch', 'allowAdding':'true'}">
    <e-columns>
        <e-column field="startDate" headerTextAlign="center" editType="datepicker" width="150" format="{0:dd.MM.yyyy}" [editParams]="{'locale': 'ru-RU', buttonText: 'Сегодня'}" [allowFiltering]="false" headerText="Дата с"></e-column>
        <e-column field="endDate" headerTextAlign="center" editType="datepicker" width="150" format="{0:dd.MM.yyyy}" [editParams]="{'locale': 'ru-RU'}" [allowFiltering]="false" headerText="Дата по"></e-column>
        <e-column field="id" [visible]="false" [isPrimaryKey]="true"></e-column>
    </e-columns>
</ej-grid>

The fields that need to be localized are startDate and endDate fields. The buttonText property i tried for testing works perfectly, however, the locale itself (days and month names) dont get localized. Can you help me with this problem?

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