Add, Modify or Override the HTML tag attributes

The pulldown has only the options append and overwrite, but the translation / description is also saying modify, so I assume that Modify and Override is the same? And Add should be Append in the translation / description?

Append will append the value to the attribute value if it has one, overwrite will override any existing value!

Maybe I was not clear enough: The language file is saying append, write and overwrite. In total 3 options, but the pulldown has only 2 options.

what language file ? please send a screenshot!

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This is made from the original language file made by "Build language file".

Ok, it's just a description, the behavior will do that, it will add new attribute or modify an existing one!