Black Friday – a devastating pandemic sweeps through New York City, and one by one, basic services fail. In only days, without food or water, society collapses into chaos.
Yes you'll be able to get English support from your Uplay version. Not sure about the second question, if you already own a copy of the game it might not overwrite it with a new version of the game on Uplay so you'd likely need a new account as I am not sure if you can have two versions of the game on your Uplay account (but I may be wrong).
About 2nd question. I found some info in comments section of Gold edition, please take a look https://uk.gamesplanet.com/community/tom-clancy-s-the-division-uplay-key--2631-1/discussions/30837-product_comments/54025-comment#cm-comments , read asnwer of your employee with nickname "chrisv" saying "We had a similar case with a customer from Japan before, who wished to have RoW language support and he could activate on his existing account, not loosing any information." So i do hope this will work.
Should be fine we've had a number of people buying it from Russia.
So i bought Gold just in case.
Seems like all works fine. In case someone else will ask you similar questions, i leave you an image -- https://i.imgur.com/vDrmWnl.png -- your keys added those 2 lines (WW and ASIA lang packs). I started game it was in RU but it actually allowed me to switch to any other language. I switched to English with no problems. All progress is saved, no worries. The only thing i add is that its probably would be enough to buy base version. But i don't care as long as it works.
Thank you for all support you did!
Great glad to hear it worked for you!
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