Oh wow, Wii U can only have 1 account and must match console's region
Looks like we will need to wait for more clarification from Nintendo. It's easy to say "region free", but region exists in so many aspects: console region, account region, game region, DLC region etc. What exactly is 'region free'?
For example, if I have a US Switch (which is what 'official' SG version is likely to be) and US account, it's great that I can buy UK version of a game (physical card) if it is cheaper. However what about DLCs? Can the DLCs I buy from e store using my US account work with the UK game card? And if mine is UK but my friends have US version of a game, can we play together? What about game patches, will my US account be delivering UK game patches? Especially if a particular game is not sold in another region, like if I buy a Japanese game card and my account is US, will my US account be getting Japan game patches?
If the answers are NO then 'region free' is just BS cos you still have to buy the same region (unless you dont care about any of those things). (Granted the PS4 often is not DLC cross-region compatible, but you can have multiple accounts on the same PS4 and games/DLCs are shared among them, so you can buy UK DLC for your UK game and play using US account, no problem there.)
For now, best to take "region free" with a grain of salt till there's more info. (Though we probably won't see much info coming cos Japan or US media don't care about cross-region, they stick to their own region all the time. It's only us Asians who's so lucky to have so many choices.)