CEUR-WS: all English?

CEUR-WS volumes are predominantly including papers in English but there are a number of exceptions.

Since about a year, we demand that non-English papers have at lest an English abstract to allow the international readership to assess whether a paper matches their interest.

I wonder whether we should move completely to English and demand that all papers are written in English. The readership of CEUR-WS is international and English is the de-facto for publishing within computer science (and most other sciences as well).

What do you think?