The new Collins word list aka CSW19 will be out in May 2019, WESPA Dictionary Committee announced recently. WESPA Chairman, Elie Dangoor confirmed that the guide date for adoption in WESPA related events is July 1st 2019 and member associations are 'free to choose their own adoption date, although we would expect them to comply for WESPA rated events, especially international ones'  in an interview on the WESPA website.
The Nigeria Scrabble Federation Technical Director, Faruq Baba-Inna has confirmed July 1st as the official adoption date for all Scrabble events in Nigeria.

A total of 2,862 (two thousand eight hundred and sixty-two) new words will be added into CSW19 while 29 words are to be deleted from the current (CSW15) list. The total number of words in CSW19 will be 279496 according to WESPA Dictionary Committee Chair, Darryl Francis in the interview. Dictionary Committee member, David Sutton confirms that an Initiation Kit will be made available in electronic (.pdf) form on May 2nd this year.

The new additions include 3 (three) new two-letter words like EW, ZE and OK and 6 (six) new three-letter words. EW (used to express disgust) and OK (all right) are adoptions from The Official Scrabble Players Dictionary 6th edition (OSPD6), while ZE (used as a gender-neutral third person) was adopted from the 2018 edition of Collins English Dictionary. According to Darryl, the new words are from three sources.

• Collins English Dictionary (2018 edition)
• The Official Scrabble Players Dictionary 6th edition (OSPD6)
• The Official Tournament and Club Word List (2018 edition)

Sources : Collins Dictionary, Hasbro Scrabble Tools and  WESPA