The site exists in Sinhala, Tamil and English. Just going by the size of the archives, it doesn’t seem to be the case that all the material in English, is there in Sinhala and Tamil, and indeed, all that’s present in Sinhala, is there in Tamil.
The second archive was on 12 December 2016. Download the archive (in all three languages) here.
The third archive was taken on 21 June 2017, and for the English version of the site only. Download it here.
Fourth archive was taken on 1 January 2018, and again for the English version of the site only. Download it here.
Fifth archive of the English, Tamil and Sinhala sites combined taken on 30 April 2018. Download here (note this is a 9Gb ZIP file).