Bugs in content types

When I try to set up an interactive video and the WP is in German or Spanish (I don't know if in other languages as well) I can't do it. The translated texts seem to be too long and displace dialogs of configuration and I cannot access it. The WP in English USA works perfectly

Hello,

I have H5P (version 1.15.3) embedded in my website posts via wordpress (version 5.8.1), using Divi theme version 4.10.8.

All H5P content appears normally on all my English language pages but not at all on the French pages although I have created separate content for each language and the embedded code is different. For example one exercise is created for my English page with one code and a separate exercise is created for my French page with another code.

For example this page has H5P content:

I have a problem to Add New > Create new H5P through the H5P plugin. After clicking ADD NEW and CREATE button, no response at all. 
Hope somebody can help me