For those who wish to examine/explore the beast, the actual browser is here: https://mesh-browser.de/
Basically, this tool gives you English and German versions of the US National Library Medical Subject Headings MeSH). MeSH is the thesaurus providing the controlled vocabulary used to search PubMed/MEDLINE. So this tool just provides related terms to any search term (for example, see "Anti-impf Bewegung"/Anti-vax movement). It's a simple interface providing a thesaurus of terms for those carrying out these searches.
Of course, the result of doing such a search in German gives you MeSH terms with which to explore PubMED, and the results of that will be in English. Having a multilingual interface producing results in English is a start, but what we need is a multilingual interface producing results in other languages... Given the current state of machine translation, that is far away.
Incidentally, I hope the translation is better than the abstract of the cited paper, in which the German National Library of Medicine apparently "overtook" the translation work (rather than "took it over...") :-)
HIFA profile: Chris Zielinski: As a Visiting Fellow in the Centre for Global Health, Chris leads the Partnerships in Health Information (Phi) programme at the University of Winchester. Formerly an NGO, Phi supports knowledge development and brokers healthcare information exchanges of all kinds. Chris has held senior positions in publishing and knowledge management with WHO in Brazzaville, Geneva, Cairo and New Delhi, with FAO in Rome, ILO in Geneva, and UNIDO in Vienna. Chris also spent three years in London as Chief Executive of the Authors Licensing and Collecting Society. He was the founder of the ExtraMED project (Third World biomedical journals on CD-ROM), and managed the Gates Foundation-supported Health Information Resource Centres project. He served on WHOâ€™s Ethical Review Committee, and was an originator of the African Health Observatory. Chris has been a director of the World Association of Medical Editors, UK Copyright Licensing Agency, Educational Recording Agency, and International Association of Audiovisual Writers and Directors. He has served on the boards of several NGOs and ethics groupings (information and computer ethics and bioethics). UK-based, he is also building houses in Zambia. chris AT chriszielinski.com
His publications are at www.ResearchGate.net and https://winchester.academia.edu/ChrisZielinski/ and his blogs are http://ziggytheblue.wordrpress.com and https://www.tumblr.com/blog/ziggytheblue