title_body: Name of a group of languages with has "less is more" property
upvoted_answer: These languages could be called minimalist conlangs. This term has been applied to languages like Toki Pona quite regularly, as a Google search will bear out. The term has also been used to describe a number of languages on the CBB, such as Sint and Nomadic.
  
  The same word can be applied to parts of a language, e.g. Davush on CBB refers to their Shiruitoan language as having a minimalist phonology.