Hi Tomasz,
Thanks for contacting Syncfusion support.
Based on the details provided in your update, we understood that you were facing issues while trying to globalize the EJ2 components to Spanish culture (es-ES) using setCulture method
From the attached screenshot, we suspect that you have tried to load the CLDR data files for Spanish (es-ES). Our internationalization library uses CLDR data for formatting and parsing Dates, number objects and CLDR data does not support es-ES locale.
Please check the below link to know about the packages available in CLDR.
So, we suggest using language code es locale instead of es-ES to globalize the EJ2 components to Spanish culture.
Also, please ensure that the CLDR data packages installed properly in your application and CLDR JSON data are loaded in your component. For your convenience, we have prepared a sample by globalizing the DatePicker and Calendar to Spanish culture.
Please, find the sample from the following link.
After, extracting sample run the below commands to launch the sample in the web browser.
Please, let us know if you need any further assistance.
Regards,
Deepa L.