The publication of the translation and cultural adaptation of the PG-SGA for the Dutch setting has been published in Cancer Nursing: https://www.ncbi.nlm.nih.gov/pubmed/28538001
This study, utilizing the ISPOR Principles, has set the standard for the multiple other (ongoing) translation and cultural adaptation processes of the PG-SGA worldwide, for example the Portuguese, Brazilian, Thai, Norwegian, German, Italian, Danish and others.
You can download the Dutch and Portuguese versions of the PG-SGA, as well as the original English PG-SGA, here.