Content Customization In Mandatory Field Of MEC Plugin
From this document about the booking form in MEC, you can see that content customization in the mandatory field of MEC plugin has a facile and visual procedure. However, there are certain fields in this form that are compulsory, and you are obliged to consider them.
Your website may require customization for the content of them and here you can see except for the name and email you can alter the rest based on your preferences.
Furthermore, the translation method in the modern event calendar can give you this possibility to change any string. If your modification is related to the language, then this would be extremely handy.