The problem for a publisher
An established instrument entering a new language market is exposed in a way it is not at home. Translation without cultural adaptation breaks item meaning. Adaptation without invariance testing produces a version whose scores cannot honestly be read against the original norms. Local norms, where they exist at all, are often built on whatever sample was convenient. The result is an instrument carrying your name that no longer performs the way your manual says it does.
What a regional partner does about it
Translation and cultural adaptation to a documented protocol rather than by ear. Measurement invariance testing against the source language version, so the comparison to your published norms is either supported or explicitly qualified. Local normative data collection to a defined sampling frame, with achieved cell composition reported rather than raw sample size. Administration, scoring and reporting to your licence terms, and the technical documentation your own quality assurance would expect.
Where this fits
Clinical, occupational, educational and safety critical assessment, in Montenegrin, Serbian, Croatian and Bosnian, with delivery to clinics, employers, public bodies and courts in the region. Licensing structures range from regional distribution through to full adaptation and norming partnerships, and which of those makes sense depends on how much of the instrument has to change to work here.
Due diligence
Publishers considering a regional appointment reasonably ask for evidence before they grant one. Licences, professional insurance, standard operating procedures and data protection assessment are available on request, and it is sensible to ask.