Ultimately @Julianassange has been quite active backing Catalonia independence (or helping Rusia to slightly destroy Europe). He is suposed to live in Equador's embassy in London since 2012.
His twitter account @Julianassange made his first tweet 14-02-2017 after 5 years "dormant". He has written up to now 3163 tweets (all of them after that date). During his first months, he wrote around 10 tweets per day about different topics (US,CIA,Sweden, Equador...).
It has been told on April 2017 that arresting Julian Assange by US is a priority. Suddenly he meet with lobbist for leaving EU Nigel Farange. So he is gathering friends against US and its partner EU. Who could be? Those that wants to slightly destroy EU: Brexit backers and Russia. No Israel as it's know he is antisemite.
If you see the "reborn" twitter's history from Assange, he never mentioned Catalonia nor Spain until 09-09-2017 (his first tweet ended with a fight with Perez-Reverte). Then suddenly started writing around 50 tweets per day exclusively for the Catalan issue!! The kind of tweets he made had deep and documented content, no colloquial comments, so it's impossible he could write on his own.
Summarizing: surely Assange is bribed by Generalitat in order to start massively publishing news backing independence of Catalonia. Generalitat contacted him using:
We open governments // Contact: https://wikileaks.org/#submit // PGP: A04C 5E09 ED02 B328 03EB 6116 93ED 732E // Editor: @JulianAssange // Artwork: @WLArtForce
Then he started speaking about a country that he never mentioned, never knew and with an intensity he never performed. Generalitat from Catalonia surely is making the payments via its offshore accounts (since the local are frozen by Spanish Government) to Russia directly (that controls his ID), that uses his Fake-News Departments (with a long history like what was done against US campaigns) to publish massively in the Assange account, since it's impossible a single human being can generate that daily amount of deep and worked tweets. His current work ressembles more to a Community Manager Department collecting news from different sources (provided by Catalan subsidized media), than a single person tweet.
That way is a win-win for the countries that want to weaken US and EU (splitting it in more countries):Russia and China. Assange wins that has more power to deal with US authorities its arrest order raised on February this year, apart of making some money from naive catalans.
It explains also why is Catalan Generalitat so confident in going forward to independence, despite having same referendum results as 9-N 2014 and never reachen the half of votes. Because Generalitat has a strong hidden partner: Russia, and a proxy: Assange.