Hi Balasubramanian,
We suspect that your requirement is to localize the grid content based on certain culture. We can set culture for the grid using the locale property of the grid and, by referring the corresponding culture file in your sample project.
The culture file can be found in the following location.
C:\Program Files (x86)\Syncfusion\EssentialStudio\XX.X.X.XX\JavaScript\assets\scripts\i18n
Here, XX.X.X.XX denotes the Product Version such for example, 14.3.0.49
Please refer to the below documentation for more information on the localization concept.
Here is a demo grid sample with French culture, which has similar pattern such that thousand separators are space and decimal separators with a comma.
Please try the above sample. If we have misunderstood your requirement, please share details on which culture/scenario, you would like to change localize the grid values.