title_body: Constructing a language based on existing languages from different families I wonder how is it possible to construct a language based on the existing languages. There are Indo-European, Altaic, Semitic, and a small portion of Dravidian and Caucasic languages in my country, and I am thinking of a constructed language based on all of these languages.
upvoted_answer: There should be no problem in doing so -- just mix and match features from the various source languages. A precedent for this for example is English:
  
  
  the syntax/grammar is mainly Germanic, including many function words
  the vocabulary is mixed (Latin, Norse, Anglo-Saxon, Norman French, Indian, ...)
  
  
  I would choose on language as the "base" (in the English case it's Old English/Anglo-Saxon), and then modify it by replacing/adding some of the vocabulary from the different languages. Also, some grammatical features (morphological endings etc) could be mixed up.
  
  If you do it iteratively (ie revising the language multiple times, simulating contact between the current version and another influencing language), you can also take into account other types of changes, such as dropping endings which are harder to pronounce, or making higher frequent words shorter and less regular.
  
  What you do exactly is up to you, but there shouldn't be any problem from a linguistic point of view.