when we select a place in QDK for a goto statement, ex: place1 ( with the alias Library), when we play the game we can't access this place with the alias, by typping "go to Library", only by typping "go to place1".
We can always manually write in QDK the name of the alias instead of selecting the place, but it doesn't seem normal to do such : the game should undestand when we type the alias' name it's refering to the original place's name.

I suppose this should indeed be the automatic behaviour. Currently in your example, in ASL you would use

place <library> goto <place1>

This is reasonably easy enough if you're coding by hand but it's a bit awkward when using QDK, so I shall make

place <place1>

display "you can go to the library" and accept "go to library". Presuming the library room has a prefix of "the". Another one for my "to do" list.

Hmm, I got round to this point on my "to do" list and then realised this has been a feature of Quest since version 3.11! I do like it when that happens, but it makes me wonder what version you're using, since I'm sure you must be using 3.12 or 3.5 beta... so this should be working anyway. If you send me your ASL file I can take a look into this to see what's happening.