AAArulraj A Syncfusion Team December 14, 2018 06:45 AM UTC
Thanks for using Syncfusion product.
By default, GridControl does not have the support to filter the values. So, we suspect that you may use GridGroupingControl. To localize the filter strings in GridGroupingControl, you could implement the ILocalizationProvider interface and modify the strings based on your culture Portuguese using GetLocalizedString method. Please refer the following code example and our Dashboard sample
//This should initialized before initializing the GridGroupingControl