The EU Parliament press release is also claiming that a number of non-commercial and "small" platforms will be excluded.
If you fear that arXiv will implement filters that will recognize that what you are uploading is a translation of an obscure Prussian research paper and block the upload, I don't think that's going to happen. (But I will be really impressed if it happens!)
Why are journals not sending a bombardment of requests already? Why would they start now?