The European Union Open Data Portal (EU ODP) gives you access to open data published by EU institutions and bodies. All the data you can find via this catalogue are free to use and reuse for commercial or non-commercial purposes.
Do you know that you can find lots of language-related datasets on the EU Open Data Portal?
From language resources for optimising machine translation systems to glossaries and thesauri, as well as surveys and other freely reusable data.
Discover too apps like Coreon and Sketch Engine, which use this free data to create multilingual working tools.