Lack of terminological equivalents among languages

Nature 
A persistent obstacle to translation into languages which are relatively undeveloped in some conceptual domain is the lack of equivalent scientific and technical terms. This is particularly important for the preparation of textbooks in such languages.
Incidence 
This situation is not only important in developing countries where even relatively simple scientific terms do not have a precise equivalent, but also in developed countries.
Aggravated by 
Value(s) 
Type 
(F) Fuzzy exceptional problems