month calender browser translation

[Tonyt8]

Hello, Eventnews 3.0.0 news 7.3.1 Typo3 9.5.13 file: Month.html

I hope you can help me solve the translation issue I have. Where can I change the month view calender browser "next" and "previous" month names to another language. I cannot get Dutch months translation working. Dutch is the default language. and I'm sure it is congifured correctly, but the month names are only shown in English The news date view"" pluging uses the Dutch language without any issues.

I am unable to fine where the translations are for this code: {f:format.date(date:nextMonthData.date,format:'%B %Y')}

Thanks.

Regards, Tony