In general, the globalization process of the project includes so called internationalization and localization. The Kendo culture script that you are adding ("fr-BE") covers the internationalization part, as it changes the number/currency and date formats. This will happen only if the script is loaded correct and the culture is set using kendo.culture (kendo.culture("fr-BE") in this case). If this is not done, then the widget will continue to use the "en-US" culture. That being said, you will need to verify that all of the required steps are done correctly.
The localization of the widget is handled by a separate Kendo localization resources. You can find a list of them here:
Please note that they are community effort and we do not provide localization for all available Kendo culture scripts out there. If you would like to localize the grid using "fr-BE", then you will need to add such resource file (probably just a copy of "fr-FR" file). Thus the widget will be able to get those messages and localize the widget.
If you would like to change the localization messages, but preserve the internationalization settings then you can just change the uiCulture and keep the culture attribute unchanged (in the <globalization> tag).
If the problem still persists, I believe that the best way will be to send us a repro demo that shows the problem. Thus we will be able to review it locally and follow you up with more details.
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