Located at the bottom of every Neopets.com page is a Select Language option. Merely click the box and select the language that you wish to choose.
It can change color and/or type of neopet! It can also level up, get more hit points ect.
Yes. It's random though. So somebody could feed Glowing Jelly exclusively to their Neopet and it will never change to the glowing color.
Wearables depend on the type of neopet you have, so here is a really helpful website database of all the items in neopets with wearables categorized by the type of neopet that can wear it. Just go to the neopet you have on the list and just press go!
According to neonewsnow.com the Witchy Negg 'Can change your NeoPet into a Lenny, Tuskainny, or Moehog, change NeoPets gender, boost there intelligence, raise there HP or cure any diseases the NeoPet has.'
There are only two ways for your neopet to be a baby neopet.1. Find and buy a baby paintbrush. These can get veryexpensive, but it makes them look SO cute! However, if you use the Shop, Trade, or Auction wizard, you won't find the brush (as it is with all rare items). I suggest posting an ad on a website, your profile, a pet's page (especially the one that you want to paint).2. A very rare random event will turn your active Neopet into a baby neopet. This is how my lupe got painted baby.